Armor Class 13
Hit Points 45 (10d6 + 10)
Speed 20 ft., fly 40 ft.
Damage Resistances cold
Damage Immunities fire, poison
Condition Immunities poisoned
Senses Darkvision 120 ft. (unimpeded by magical {@variantrule Darkness|XPHB}), passive Perception 12
Languages Infernal; telepathy 120 ft.
Challenge 2
Flyby. The devil doesn't provoke an Opportunity Attack when it flies out of an enemy's reach.
Magic Resistance. The devil has Advantage on saving throws against spells and other magical effects.
Multiattack. The devil makes two attacks, using Infernal Fork and Tail Spine in any combination.
Infernal Fork. m +4, reach 5 ft. Hit: 5 (1d6 + 2) Piercing damage plus 3 (1d6) Fire damage.
Tail Spine. r +4, range 20/80 ft. Hit: 4 (1d4 + 2) Piercing damage plus 3 (1d6) Fire damage.
Monster Manual (2024), p. 296