Scarab, Ruin

Flesh-Eating Aura. When creature that doesn't have all of its hp starts its turn within 10 ft. of scarab creature takes 2 (1d4) necrotic. Also magical healing within 10 ft. of it is halved.

Silent Steps. No sound emanates from it whether moving attacking or ripping into a corpse. Has advantage on Dex (Stealth) checks and each creature within 5 ft. of it is deafened.

Undead Nature. Doesn't require air food drink or sleep.

Unstoppable. Moving through difficult terrain doesn't cost it extra movement and its speed can't be reduced.

Multiattack. Two Bites. Can replace one attack with Gut Rip.

Bite. Melee Weapon Attack: +6 to hit, 5 ft., one creature,. 14 (2d10+3) slashing damage + 5 (2d4) necrotic and knocked prone or pushed 5 ft. away the scarab's choice (DC 14 Str negates prone/push).

Gut Rip. The ruin scarab tears into one prone creature within 5 ft. of it. The target takes 11 (2d10) slashing damage and 5 (2d4) necrotic and is incapacitated for 1 min (DC 15 Con half damage and isn't incapacitated). An incapacitated creature can re-save at end of each of its turns success ends effect on itself.

Relentless Pursuit. When a creature within 10 ft. of the scarab moves away from it scarab can move up to half its speed toward that creature.