TEXT: Monsters
  This PDF contains the endpapers from the printed edition of this book. These pages are 
  provided to PDF customers for use as reference sheets.
  Text and design © Gavin Norman 2019. Old-School Essentials is a trademark of Necrotic Gnome.
  
  Attack Matrix by Monster HD or THAC0
  Attack Roll to Hit AC
  Monster HD
  THAC0
  –3
  –2
  –1
  0
  1
  2
  3
  4
  5
  6
  7
  8
  9
  Normal H
  20 [–1]
  20
  20
  20
  20
  19
  18
  17
  16
  15
  14
  13
  12
  11
  Up to 1
  19 [0]
  20
  20
  20
  19
  18
  17
  16
  15
  14
  13
  12
  11
  10
  1+ to 2
  18 [+1]
  20
  20
  19
  18
  17
  16
  15
  14
  13
  12
  11
  10
  9
  2+ to 3
  17 [+2]
  20
  19
  18
  17
  16
  15
  14
  13
  12
  11
  10
  9
  8
  3+ to 4
  16 [+3]
  19
  18
  17
  16
  15
  14
  13
  12
  11
  10
  9
  8
  7
  4+ to 5
  15 [+4]
  18
  17
  16
  15
  14
  13
  12
  11
  10
  9
  8
  7
  6
  5+ to 6
  14 [+5]
  17
  16
  15
  14
  13
  12
  11
  10
  9
  8
  7
  6
  5
  6+ to 7
  13 [+6]
  16
  15
  14
  13
  12
  11
  10
  9
  8
  7
  6
  5
  4
  7+ to 9
  12 [+7]
  15
  14
  13
  12
  11
  10
  9
  8
  7
  6
  5
  4
  3
  9+ to 11
  11 [+8]
  14
  13
  12
  11
  10
  9
  8
  7
  6
  5
  4
  3
  2
  11+ to 13
  10 [+9]
  13
  12
  11
  10
  9
  8
  7
  6
  5
  4
  3
  2
  2
  13+ to 15
  9 [+10]
  12
  11
  10
  9
  8
  7
  6
  5
  4
  3
  2
  2
  2
  15+ to 17
  8 [+11]
  11
  10
  9
  8
  7
  6
  5
  4
  3
  2
  2
  2
  2
  17+ to 19
  7 [+12]
  10
  9
  8
  7
  6
  5
  4
  3
  2
  2
  2
  2
  2
  19+ to 21
  6 [+13]
  9
  8
  7
  6
  5
  4
  3
  2
  2
  2
  2
  2
  2
  21+ or >
  5 [+14]
  8
  7
  6
  5
  4
  3
  2
  2
  2
  2
  2
  2
  2
  Monster Saving Throws
  Hit Dice
  Death
  Wands
  Paralysis
  Breath
  Spells
  Normal Human
  14
  15
  16
  17
  18
  1–3
  12
  13
  14
  15
  16
  4–6
  10
  11
  12
  13
  14
  7–9
  8
  9
  10
  10
  12
  10–12
  6
  7
  8
  8
  10
  13–15
  4
  5
  6
  5
  8
  16–18
  2
  3
  4
  3
  6
  19–21
  2
  2
  2
  2
  4
  22 or more
  2
  2
  2
  2
  2
  Monster Morale: Roll 2d6
  Result: Higher than morale score: mon-
  ster surrenders or flees.
  When to check: First death on side; side 
  half incapacitated.
  Morale scores of 2 or 12: Score of 2: 
  Never fights (unless cornered). Score of 
  12: Never checks morale.
  Monster Reactions: Roll 2d6
  CHA modifier: Of interacting PC applies.
  Monster Reaction Roll
  2d6
  Result
  2 or less
  Hostile, attacks
  3–5
  Unfriendly, may attack
  6–8
  Neutral, uncertain
  9–11
  Indifferent, uninterested
  12 or more
  Friendly, helpful
  
  Game Statistics
  Armour Class (AC)
  The monster’s ability to avoid damage.
  Ascending AC: The optional AAC score 
  is listed afterwards in square brackets.
  Hit Dice (HD)
  The number of d8s rolled to determine an 
  individual’s hit points.
  Asterisks: The number of special abilities 
  the monster has, for XP calculation.
  Modifiers: Modifiers to the HD (e.g. +3, 
  –1) are applied after rolling hit points.
  Fractional Hit Dice: Some monsters are 
  listed as having less than one HD, either 
  as ½ (roll 1d4) or as a fixed number of hp.
  Average hit points: The average hit point 
  value is listed in parentheses.
  Attacks Usable Per Round (Att)
  The attacks that the monster can use 
  each round, with the inflicted damage in 
  parentheses.
  Alternative attack routines: Square 
  brackets are used to distinguish between 
  alternative attack routines that a monster 
  may choose from.
  Saving Throw Values (SV)
  The monster’s saving throw values: D: 
  Death/poison; W: Wands; P: Paralysis/
  petrification; B: Breath attacks; S: Spells/
  rods/staves.
  Save as HD: The HD at which the mon-
  ster saves is listed in parentheses (NH in-
  dicates that it saves as a normal human).
  Attack Roll “to Hit AC 0” (THAC0)
  The monster’s ability to hit in combat.
  Attack bonus: The monster’s attack 
  bonus (required when using the optional 
  rule for Ascending AC) is listed after-
  wards in square brackets.
  Movement Rate (MV)
  The speed at which the monster can 
  move. (Encounter movement rate noted 
  in parentheses.)
  Modes of movement: If the monster 
  has multiple modes of movement (e.g. 
  walking, flying, climbing), they are listed 
  individually, separated by slashes.
  Morale Rating (ML)
  The monster’s likelihood to flee in battle.
  Alignment (AL)
  The monster’s affiliation to Law, Neutrali-
  ty, or Chaos.
  XP Award (XP)
  Pre-calculated XP award for the monster.
  Number Appearing (NA)
  The number of monsters encountered in 
  the dungeon or wilderness/lairs.
  Treasure Type (TT)
  The letter code used to determine the 
  treasure possessed by the monster(s).
  Infravision
  All non-human monsters have infravi-
  sion to 60’ (unless specified otherwise).
  Languages
  20% of intelligent monsters speak Com-
  mon (unless specified otherwise).
  Persons
  The following monsters in this book are 
  classified as “persons”, for the sake of 
  magical effects: acolyte, bandit, berserker, 
  brigand, buccaneer, bugbear, dervish, 
  dwarf, elf, gnoll, gnome, goblin, halfling, 
  hobgoblin, kobold, lizard man, medium, 
  merchant, neanderthal, nixie, noble, nor-
  mal human, ogre, orc, pirate, pixie, sprite, 
  trader, troglodyte, veteran.
  
  Less than 1 HD
  Bat, normal
  Centipede, giant
  Goblin
  Halfling
  Hawk
  Killer bee
  Kobold
  Normal human
  Rat
  Rat, giant
  Sprite
  1 HD
  Acolyte
  Bandit
  Beetle, giant fire
  Berserker
  Brigand
  Buccaneer
  Dervish
  Dwarf
  Elf
  Ferret, giant
  Gnome
  Hobgoblin
  Medium
  Merchant
  Mermen
  Nixie
  Nomad
  Orc
  Pirate
  Pixie
  Pterodactyl
  Shrew, giant
  Skeleton
  Snake, spitting 
  cobra
  Stirge
  Termite, swamp
  Trader
  Veteran
  2 HD
  Bat, giant
  Bat, giant vampire
  Beetle, giant oil
  Camel
  Cave locust
  Crocodile
  Dryad
  Fish, giant bass
  Fly, robber
  Ghoul
  Gnoll
  Golem, wood
  Green slime
  Herd animal, small
  Horse, riding
  Insect swarm
  Lizard man
  Mule
  Neanderthal
  Pegasus
  Rock baboon
  Shadow
  Shark, bull
  Snake, pit viper
  Spider, giant crab
  Termite, freshwa-
  ter
  Toad, giant
  Troglodyte
  Veteran
  Wolf
  Yellow mould
  Zombie
  3 HD
  Beetle, giant tiger
  Boar
  Bugbear
  Carcass crawler
  Cat, mountain lion
  Crab, giant
  Fish, giant piranha
  Grey ooze
  Harpy
  Hawk, giant
  Hellhound
  Herd animal, 
  medium
  Hippogriff
  Horse, draft
  Horse, war
  Insect swarm
  Living statue, 
  crystal
  Lizard, giant gecko
  Lycanthrope, 
  wererat
  Noble
  Shrieker
  Snake, sea snake
  Spider, giant black 
  widow
  Thoul
  Veteran
  Wight
  4 HD
  Ape, white
  Bear, black
  Blink dog
  Cat, panther
  Centaur
  Doppelgänger
  Driver ant
  Gargoyle
  Gelatinous cube
  Hellhound
  4 HD Continued...
  Insect swarm
  Living statue, iron
  Lizard, giant draco
  Lycanthrope, wer-
  eboar
  Lycanthrope, 
  werewolf
  Medusa
  Ogre
  Rhagodessa
  Scorpion, giant
  Shark, mako
  Snake, giant rattler
  Spider, giant tar-
  antella
  Termite, sea
  Unicorn
  Weasel, giant
  Wolf, dire
  Wraith
  5 HD
  Bear, grizzly
  Cat, lion
  Cockatrice
  Fish, giant rockfish
  Hellhound
  Hydra
  Hydra, sea
  Living statue, rock
  Lizard, giant 
  horned chame-
  leon
  Lycanthrope, wer-
  etiger
  Mummy
  Ochre jelly
  Owl bear
  Pteranodon
  Rust monster
  Snake, rock py-
  thon
  
  6 HD
  Basilisk
  Bear, polar
  Caecilia
  Cat, tiger
  Crocodile, Large
  Dragon, white
  Hellhound
  Hydra
  Hydra, sea
  Leech, giant
  Lizard, giant 
  tuatara
  Lycanthrope, wer-
  ebear
  Manticore
  Minotaur
  Rhinoceros, nor-
  mal
  Roc, small
  Sea serpent (less-
  er)
  Spectre
  Squid, giant
  Troll
  Warp beast
  Whale, killer
  7 HD
  Bear, cave
  Djinni (lesser)
  Dragon, black
  Griffon
  Hellhound
  Hydra
  Hydra, sea
  Vampire
  Wyvern
  8 HD
  Cat, sabre-toothed 
  tiger
  Dragon, green
  Dragon, sea
  Elemental, air 
  (lesser)
  Elemental, earth 
  (lesser)
  Elemental, fire 
  (lesser)
  Elemental, water 
  (lesser)
  Fish, giant catfish
  Giant, hill
  Golem, bone
  Gorgon
  Hydra
  Hydra, sea
  Invisible stalker
  Octopus, giant
  Rhinoceros, 
  woolly
  Salamander, flame
  Shark, great white
  Treant
  Vampire
  9 HD
  Chimera
  Dragon, blue
  Elephant
  Giant, stone
  Hydra
  Hydra, sea
  Lycanthrope, devil 
  swine
  Vampire
  10 HD
  Black pudding
  Dragon, red
  Efreeti (lesser)
  Fish, giant stur-
  geon
  Giant, frost
  Golem, amber
  Hydra
  Hydra, sea
  11 HD
  Dragon, gold
  Giant, fire
  Hydra
  Hydra, sea
  Stegosaurus
  Triceratops
  12 HD
  Elemental, air
  Elemental, earth
  Elemental, fire
  Elemental, water
  Giant, cloud
  Hydra
  Hydra, sea
  Roc, large
  Salamander, frost
  Titanothere
  Whale, narwhal
  13 HD
  Cyclops
  15 HD
  Crocodile, giant
  Giant, storm
  Mastodon
  Purple worm
  16 HD
  Elemental, air 
  (greater)
  Elemental, earth 
  (greater)
  Elemental, fire 
  (greater)
  Elemental, water 
  (greater)
  20 HD
  Golem, bronze
  Tyrannosaurus rex
  30 HD
  Dragon turtle
  36 HD
  Roc, giant
  Whale, sperm
  
SOURCE: textdata/thevault/Old-School Essentials BX Essentials/Old-School Essentials Classic Fantasy/Old-School Essentials Classic Fantasy Monsters Endpapers [v0.2].pdf