Medium Fiend (Devil), Lawful Evil
Traits
Hellish Restoration. If the lemure dies in the Nine Hells, it revives with all its Hit Points in 1d10 days unless it is killed by a creature under the effects of a Bless spell or its remains are sprinkled with Holy Water.
Actions
Vile Slime. Melee Attack Roll: +2, reach 5 ft. Hit: 2 (1d4) Poison damage.
Found on p.194 of MM2025 (Free Rules)