Corruption corpse

Stench. Any creature within 10ft of the corruption corpse must make a dc 13 con save or be poisoned for 1 minute, a target can retry a save at the end of there turn. 

Death Burst. When the corruption corpse dies, it explodes in a burst of dark energy. Each creature within 5 ft. of it must make a DC 13 constitution saving throw, taking 8 (2d6) necrotic damage on a failed save, or half as much damage on a successful one.

Undead Fortitude. If damage reduces the corruption corpse to 0 hit points, it must make a Constitution saving throw with a DC of 5+the damage taken, unless the damage is radiant or from a critical hit. On a success, the corruption corpse drops to 1 hit point instead.

Slam. Melee Weapon Attack: +5 to hit, reach 5 ft., 1 target. Hit: 6 (1d6 + 3) [bludgeoning] damage. 

Mote of corruption. RangedWeapon Attack: +5 to hit, range 10/40 ft., 1 target. Hit: 9 (2d6 + 3) [necrotic] damage and be poisoned for 1 minute but can make a save (dc 13 con) to end the poison.