Small Fiend, lawful evil
Armor Class 15 (natural armor)
Hit Points 91 (14d6+42)
Speed walk +25, climb +20
Challenge 5
Skills perception +3
Damage Vulnerabilities piercing from magic weapons wielded by good creatures
Senses darkvision 60', passive Perception 13
Languages Common, Infernal, telepathy 60'
False Appearance (Object Form Only). While it remains motionless it is indistinguishable from an ordinary object.
Limited Magic Immunity. Can't be affected or detected by spells of 2nd level or lower unless it wishes to be. Has advantage on saves vs. all other spells and magical effects.
Multiattack. Two Claw attacks or uses False Promises twice. It can replace one use of False Promises with use of Spellcasting.
Claw (Fiend Form Only). Melee Weapon Attack: +5 to hit, 5 ft., one target, 7 (2d4+2) slashing damage + 9 (2d8) psychic.
False Promises. Whispers promises of power and riches in mind of one creature it can see within 60' of it: 18 (4d8) psychic and charmed 1 min (DC 15 Wis half damage and isn't charmed). While charmed creature has disadvantage on saves vs. pustakam's enchantment spells. Charmed creature can re-save at end of each of its turns success ends effect on itself.
Spellcasting. Cha (DC 15) no material or somatic components: At will: detect thoughts mage hand minor illusion3/day ea: command suggestion
Change Shape. Transforms into Tiny object or back into true fiend form. Its stats except size are same in each form. Items worn/carried not transformed. Reverts on death.
Source: Tome of Beasts 3 · OGL/Open