Armor Class undefined
Hit Points 50 (Demon only) or 40 (Devil only) or 60 (Yugoloth only) + 15 for each spell level above 6th
Speed 40 ft., fly 60 ft., climb [object Object] ft.
Damage Resistances fire
Damage Immunities poison
Condition Immunities poisoned
Senses darkvision 60 ft., passive Perception 10
Languages Abyssal, Infernal, telepathy 60 ft.
Challenge —
Magic Resistance. The fiend has advantage on saving throws against spells and other magical effects.
Death Throes (Demon Only). When the fiend drops to 0 hit points or the spell ends, the fiend explodes, and each creature within 10 feet of it must make a Dexterity saving throw against your spell save DC. A creature takes 2d10 + summonSpellLevel fire damage on a failed save, or half as much damage on a successful one.
Devil's Sight (Devil Only). Magical darkness doesn't impede the fiend's darkvision.
Multiattack. The fiend makes a number of attacks equal to half this spell's level (rounded down).
Bite (Demon Only). Melee Weapon Attack: to hit, reach 5 ft., one target. Hit: 1d12 + 3 + summonSpellLevel necrotic damage.
Claws (Yugoloth Only). Melee Weapon Attack: to hit, reach 5 ft., one target. Hit: 1d8 + 3 + summonSpellLevel slashing damage. Immediately after the attack hits or misses, the fiend can magically teleport up to 30 feet to an unoccupied space it can see.
Hurl Flame (Devil Only). Ranged Spell Attack: to hit, range 150 ft., one target. Hit: 2d6 + 3 + summonSpellLevel fire damage. If the target is a flammable object that isn't being worn or carried, it also catches fire.
Tasha's Cauldron of Everything, p. 112