DUNGEON ENCOUNTERS

Dungeon Random Monster Level Determination Matrix
Monster Levels One-Ten
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Human Subtable
Character Subtable
Level I
Level II
Level III
Level IV
Level V
Level VI
Level VII
Level VIII
Level IX
Level X
Appendix C: 
Random Monster Encounters
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DMG

Procedure: When a random encounter is indicated by the periodic check,
and you do not have an encounter table specifically devised for the area, roll
a d20. Cross-index the level of the dungeon (or whatever is equivalent to
it) with the die result and read up to find which DUNGEON RANDOM
MONSTER TABLE (by Roman numeral monster level, I to X) to consult to
find the type of monster encountered. Once the table is found, dice will
discover at random which monster has been encountered and in which
numbers.

1. Wandering Monster Check: Every 3rd turn the GM rolls
to see if any wandering monsters are encountered (typically
1 in 6 -- consult specific level key for non-standard
frequency of check or likelihood of encounter).
- OSRIC, page 138

MONSTERS ENCOUNTERED ADJUSTMENT FOR RELATIVE DUNGEON LEVEL

The Numbers column assumes that the encounter will take place on the
level which is equivalent to the level assigned to the particular monster
(cf. DUNGEON RANDOM MONSTER LEVEL DETERMINATION MATRIX). In
order to adjust for the more difficult conditions on lower levels of the
dungeon, and the relatively easier ones above, use the following rules:

Lesser monsters on lower levels have their numbers augumented by a like
number of the same sort of creatures for each level of the dungeon beneath
that of the assigned level of the monster type encountered.
Example: First level monsters on the 2nd level of a dungeon will be twice
as numerous as the Numbers variable indicates, i.e. 2-8 giant ants, rather
than 1-4, if they are encountered on the 2nd level (or its equivalent) of a
dungeon. The same is true for second level monsters encountered on the
3rd dungeon level, third level monsters on the 4th dungeon level, etc.
There are two exceptions to this rule:

1.    Characters are increased by level of experience rather than by
        numbers encountered, as indicated in the DUNGEON RANDOM MONSTER TABLE Notes.

2.    Ninth and tenth level monsters are typically given attendant monsters,
        rather than greater numbers, in lower dungeon levels, i.e., a demon
        prince encountered on the 11th dungeon level might have a single
        type I demon attendant, while on the 15th level of the dungeon the
        same demon prince might have 5 such lesser demons or a pair of type
        III escorts.

Greater monsters on higher dungeon levels will have their numbers reduced by 1
for each level of the dungeon above their assigned level, subject to a minimum
number of 1. Example: 1-3 shadows are normally encountered on
the 4th level of the dungeon; as shadows are fourth level monsters, a maximum
of 2 can be encountered on the 3rd dungeon level, and but 1 on the
2nd level. (Fourth level monsters cannot be encountered on the 1st level of
the dungeon.) Hydras, for instance, will have fewer heads, while creatures
with attendants will have fewer or none at all on the lesser-numbered
levels.

DUNGEON RANDOM MONSTER LEVEL DETERMINATION MATRIX (d20)                                                            Monster Level Table Which Must Be Consulted
Equivalent Level Of 
The Dungeon
I II III IV V VI VII VIII IX X
1st 1-16 <3 x I> 17-19 <2 x II> 20 <1 x III> - - - - - - -
2nd-3rd 1-12 <5 x I> 13-16 <4 x II> 17-18 <3 x III> 19 <2 x IV> 20 <1 x V> - - - - -
4th 1-5 6-10 11-16 17-18 19 20 - - - -
5th 1-3 4-6 7-12 13-16 17-18 19 20 - - -
6th 1-2 3-4 5-6 7-12 13-16 17-18 19 20 - -
7th 1 2-3 4-5 6-10 11-14 15-16 17-18 19 20 -
8th 1 2 3-4 5-7 8-10 11-14 15-16 17-18 19 20
9th 1 2 3 4-5 6-8 9-12 13-15 16-17 18-19 20
10th-11th 1 2 3 4 5-6 7-9 10-12 13-16 17-19 20
12th-13th 1 2 3 4 5 6-7 8-9 10-12 13-18 19-20
14th-15th 1 2 3 4 5 6 7-8 9-11 12-17 18-20
16th 1 2 3 4 5 6 7 8-10 11-16 17-20

DUNGEON RANDOM MONSTER TABLES

MONSTER LEVEL I
 
Dice Score Creature Encountered Numbers
01-02 Ant, giant 1-4
03-04 Badger* 1-4
05-14 Beetle, fire 1-4
15 Demon, manes 1-4
16-17 Dwarf 4-14
18 Ear seeker 1
19 Elf 3-11 (d6+d4+1)
20-21 Gnome 5-15
22-26 Goblin 6-15
27-28 Halfling** 9-16
29-33 Hobgoblin 2-8
34-48 Human -- see Human Subtable below -
49-54 Kobold 6-18
55-66 Orc 7-12
67-70 Piercer 1-3
71-83 Rat, giant 5-20
84-85 Rot grub 1-3
86-96 Shrieker 1-2
97-98 Skeleton 1-4
99-00 Zombie 1-3

* Not encountered below the 2nd level; treat as a roll of 29-33 (hobgoblin) thereafter.

** Not encountered below the 4th level; treat as a roll of 71-83 (Rat, giant) thereafter.

Monster Level I: Human Subtable
 
Dice Score Creature Encountered Numbers
01-25 Bandit* 5-15
26-30 Berserker* 3-9
31-45 Brigand* 3-9
46-00 Character -- see Character Subtable below -

* Upper level leaders and sub-leaders are not with groups numbering
under 30, and at only 50% of normal level (rounded up) for groups under
60. As a general rule, you may wish to exclude all of these encounters on
levels below whatever point you find them to be unlikely.

Character Subtable (Used For Encounters On All Dungeon Levels)

MONSTER LEVEL II
 
Dice Score Creature Encountered Numbers
01 Badger, giant* 1-4
02-16 Centipede, giant 3-13
17-27 Character -- see Character Subtable below -
28-29 Devil, lemure 2-5
30-31 Gas spore 1-2
32-38 Gnoll 4-10
39-46 Piercer 1-4
47-58 Rat, giant 6-24
59-60 Rot grub 1-4
61-72 Shrieker 1-3
73-77 Stirge 5-15
78-87 Toad, giant 1-4
88-00 Troglodyte 2-8

* Note encountered below the 3rd level; treat as a roll of 32-38 (Gnoll) thereafter.

MONSTER LEVEL III
 
Dice Score Creature Encountered Numbers
01-10 Beetle, boring 1-3
11-20 Bugbear 2-7
21-30 Character -- see Character Subtable -
31-32 Dragon -- see Dragon Subtable below 1
33-34 Fungi, violet 1-3
35-40 Gelatinous cube 1
41-45 Ghoul 1-4
46-50 Lizard, giant 1-3
51-54 Lycanthrope, wererat 2-5
55-60 Ochre jelly 1
61-72 Ogre 1-3
73-74 Piercer 2-5
75 Rot grub 1-4
76-77 Shrieker 2-5
78-84 Spider, huge 1-3
85-93 Spider, large 2-5
94-95 Tick, giant 1-3
96-00 Weasel, giant 1-4

Dragon Subtable
 
Dice Score Dragon Type Age Category (Hit Points/Die)
01-28 Black very young (1)
29-62 Brass very young (1)
63-00 White very young (1)

Determine the number of HD for a dragon as normal.

MONSTER LEVEL IV
 
Dice Score Creature Encountered Numbers
01-08 Ape, carnivorous 1-3
09-14 Blink dog 2-5
15-22 Character -- see Character Subtable -
23-24 Dragon -- see Dragon Subtable below 1
25-30 Gargoyle 1-2
31-36 Ghast 1-4
37-40 Gray ooze 1
41-44 Hell hound 1-2
45-47 Hydra, 5 or 6 heads 1
48 Hydra, pyro-, 5 heads 1
49-62 Lycanthrope, werewolf 1-2
63-75 Mold, yellow -
76-78 Owlbear 1-2
79 Rust monster 1
80-82 Shadow 1-3
83-90 Snake, giant, constrictor 1
91-94 Su-monster 1-2
95-96 Toad, ice 1
97-00 Toad, poisonous 1-3

Dragon Subtable
 
Dice Score Dragon Type Age Category (Hit Points/Die)
01-09 Black young/sub-adult (2/3)
10-20 Blue very young/young (1/2)
21-30 Brass young/sub-adult (2/3)
31-37 Bronze very young/young (1/2)
38-50 Copper very young/young (1/2)
51-54 Gold very young/young (1/2)
55-70 Green very young/young (1/2)
71-80 Red very young/young (1/2)
81-88 Silver very young/young (1/2)
89-00 White young/sub-adult (2/3)

Determine the number of HD for a dragon as normal.

MONSTER LEVEL V
 
Dice Score Creature Encountered Numbers
01-08 Character -- see Character Subtable -
09-15 Cockatrice 1-2
16-18 Displacer Beast 1-2
19-22 Doppleganger 1-3
23-24 Dragon -- see Dragon Subtable below 1
25-26 Hydra, 7 heads 1
27 Hydra, pyro-, 6 heads 1
28 Imp 1-2
29-31 Leucrotta 1-2
32-50 Lizard, subterranean 1-3
51-52 Lycanthrope, wereboar 1-3
53-60 Minotaur 1-3
61-64 Mold, yellow -
65 Quasit 1
66-67 Rust monster 1
68-70 Shrieker 2-5
71-72 Slithering tracker 1
73-74 Snake, giant, amphisbaena 1
75-82 Snake, giant, poisonous 1
83-86 Snake, giant, spitting 1
87-00 Spider, giant 1-2

Dragon Subtable
 
Dice Score Dragon Type Age Category (Hit Points/Die)
01-08 Black young adult/adult (4/5)
09-20 Blue sub-adult/young adult (3/4)
21-30 Brass young adult/adult (4/5)
31-37 Bronze sub-adult/young adult (3/4)
38-50 Copper sub-adult/young adult (3/4)
51-54 Gold sub-adult/young adult (3/4)
55-70 Green sub-adult/young adult (3/4)
71-80 Red sub-adult/young adult (3/4)
81-88 Silver sub-adult/young adult (3/4)
89-00 White young adult/adult (4/5)

Determine the number of HD for a dragon as normal.

MONSTER LEVEL VI
 
Dice Score Creature Encountered Numbers
01-03 Basilisk 1
04-10 Carrion crawler 1-2
11-16 Character -- see Character Subtable --
17 Devil, erinyes 1-2
18-19 Djinni 1
20-21 Dragon -- see Dragon Subtable below 1
22-25 Green slime --
26-28 Hydra, 8-9 heads 1
29-32 Jackalwere 1-2
33-36 Lammasu 1-3
37-38 Lycanthrope, werebear 1
39-41 Lycanthrope, weretiger 1-2
42-50 Manticore 1-2
51-55 Medusa 1
56 Mold, brown --
57-58 Mold, yellow --
59-60 Ogre magi 1-2
61-68 Otyugh 1
69-70 Rakshasa 1
71-73 Salamander 1-2
74-77 Spider, phase 1-3
78-88 Troll 1-3
89-93 Wight 1-4
94-95 Wind walker 1-2
96-98 Wraith 1-2
99-00 Wyvern 1

Dragon Subtable
 
Dice Score Dragon Type Age Category (Hit Points/Die)
01-08 Black old (6)
09-19 Blue adult (5)
20-29 Brass old (6)
30-36 Bronze adult (5)
37-48 Copper adult (5)
49-52 Gold adult (5)
53-65 Green adult (5)
66-78 Red adult (5)
79-87 Silver adult (5)
88-00 White old (6)

Determine the number of HD for a dragon as normal.
 

MONSTER LEVEL VII
 
Dice Score Creature Encountered Numbers
01-05 Black pudding 1
06-10 Character -- see Character Subtable --
11-14 Chimera 1-2
15 Demon, succubus 1
16 Demon, type I 1
17 Demon, type II 1
18 Demon, type III 1
19 Devil, barbed 1
20 Devil, bone 1
21 Devil, horned 1
22-23 Dragon -- see Dragon Subtable below 1
24 Efreeti 1
25-26 Elemental* 1
27-30 Ettin 1
31-35 Giant, hill or stone 1-3
36-38 Giant, fire or frost 1-2
39 Golem, flesh 1
40-41 Gorgon 1
42-43 Groaning spirit 1
44-46 Hydra, 10-12 heads 1
47 Hydra, pryo-, 7-9 heads 1
48-49 Intellect devourer 1
50 Invisible stalker 1
51-52 Lamia 1-2
53-56 Lizard, fire 1-3
57-59 Lurker above 1
60 Mezzodaemon 1
61-63 Mimic 1
64-65 Mind flayer 1-2
66-69 Mummy 1-2
70 Naga, spirit 1-3
71-73 Neo-otyugh 1
74 Night hag 1-2
75-78 Roper 1-2
79-82 Shambling mound 1-2
83-86 Shedu 1-2
87 Slug, giant 1
88-91 Spectre 1
92-93 Trapper 1
94-95 Umber hulk 1
96-97 Will-o-wisp 1-3
98-00 Xorn 1-3

* Choose, or use equal probabilities as applicable.

Dragon Subtable
 
Dice Score Dragon Type Age Category (Hit Points/Die)
01-08 Black very old (7)
09-19 Blue old (6)
20-29 Brass very old (7)
30-36 Bronze old (6)
37-48 Copper old (6)
49-52 Gold old (6)
53-65 Green old (6)
66-78 Red old (6)
79-87 Silver old (6)
88-00 White very old (7)

Determine the number of HD for a dragon as normal.

MONSTER LEVEL VIII
 
Dice Score Creature Encountered Numbers
01 Aerial Servant 1
02-06 Character -- see Character Subtable -
07 Demon, type IV 1
08 Demon, type V 1
09 Demon, type VI 1
10 Devil, ice 1
11-12 Dragon -- see Dragon Subtable below 1
13-17 Ghost 1
18-21 Giant, cloud 1-2
22-23 Golem, clay 1
24-26 Hydra, 13-16 heads 1
27 Hydra, pyro-, 12 heads 1
28-29 Intellect devourer 1-2
30-35 Lurker above 1
36-41 Mold, brown ---
42-43 Mold, yellow ---
44-47 Mind flayer 1-4
48-50 Naga, guardian 1-2
51-56 Neo-otyugh 1
57-64 Purple worm 1
65-69 Rust monster 1
70-73 Slug, giant 1
74-78 Trapper 1
79-86 Vampire 1
87-92 Will-o-wisp 2-5
93-00 Xorn 2-5

Dragon Subtable
 
Dice Score Dragon Type Age Category (Hit Points/Die)
01-13 Black ancient (8)
14-24 Blue very old (7)
25-31 Brass ancient (8)
32-35 Bronze very old (7)
36-43 Copper very old (7)
44-47 Gold very old (7)
48-62 Green very old (7)
63-78 Red very old (7)
79-82 Silver very old (7)
83-00 White ancient (7)

Determine the number of HD for a dragon as normal.

MONSTER LEVEL IX
 
Dice Score Creature Encountered Numbers
01-09 Character -- see Character Subtable -
10-12 Devil, pit fiend 2
13-15 Dragon -- see Dragon Subtable below 1-2
16-21 Giant, storm 1-2
22-23 Golem, stone 1
24-30 Hydra, 17-20 heads 1
31-33 Hydra, pyro-, 12 heads 1
34-40 Mold, brown 1
41-50 Mold, yellow 1
51-52 Nycadaemon 1
53-64 Purple worm 1
65-67 Rust monster 1
68-69 Titan, lesser 1
70-73 Titan, minor 1
74-80 Umber hulk 1-4
81-83 Vampire* 1
84-93 Will-o-wisp 2-5
94-00 Xorn 2-9

* Former cleric, with full powers, of 7th - 10th level.

<Note the 2-9 xorn, when their NA is listed as 1-4>
 

Dragon Subtable
 
Dice Score Dragon Type Age Category (Hit Points/Die)
01-10 Black, 2 ancient & old (8 & 6)
11-22 Blue ancient (8)
23-31 Brass, 2 ancient & old (8 & 6)
32-34 Bronze ancient (8)
35-42 Copper ancient (8)
43-46 Gold ancient (8)
47-62 Green ancient (8)
63-78 Red ancient (8)
79-82 Silver ancient (8)
83-00 White, 2 ancient & very old (8 & 7)

Determine the number of HD for a dragon as normal.

MONSTER LEVEL X
 
Dice Score Creature Encountered Numbers
01-12 Beholder 1
13-20 Character -- see Character Subtable -
21-28 Demon, prince* 1
29-30 Devil, arch-* 1
31-40 Dragon -- see Dragon Subtable below 1-2
41-50 Golem, iron 1
51-60 Lich 1
61-70 Titan, elder 1
71-80 Vampire** 1
81-00 NO ENCOUNTER -

* Select or find randomly.
** Former magic-user, with full powers, of 9th - 12th level.

Dragon Subtable
 
Dice Score Dragon Type Age Category (Hit Points/Die)
01-20 Blue, 2 ancient & very old (8 & 7)
21-26 Bronze, 2 ancient & very old (8 & 7)
27-33 Copper, 2 ancient & very old (8 & 7)
34-35 Chromatic (Tiamat)
36-40 Gold, 2 ancient & old (8 & 6)
41-60 Green, 2 ancient & very old (8 & 7)
61-63 Platinum (Bahamut)
64-94 Red, 2 ancient & old (8 & 6)
95-00 Silver, 2 ancient & old (8 & 6)

Determine the number of HD for a dragon as normal.


DUNGEON RANDOM MONSTER TABLES

MONSTER LEVEL I
 
Dice Score Creature Encountered Numbers

Dragon Subtable
 
Dice Score Dragon Type Age Category (Hit Points/Die)

Determine the number of HD for a dragon as normal.
 
 

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