Creeping Statue

Immutable Form. The creeping statue is immune to any spell or effect that would alter its form.

False Appearance. While the  creeping statue remains motionless, it is indistinguishable from a normal statue.

Multiattack. The creeping statue makes two Wilting Touch attacks, or it can swap out one Wilting Touch attack for one Time Loop Attack.

Wilting Touch. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 5 (1d6 + 2) necrotic damage. 

TIme Loop. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 5 (1d4 + 1) Psychic damage. the creature must then succeed on a DC 13 Constitution saving throw or be teleported back to where it was at the start of initiative, regardless of success or failure the creeping statue regains health equal to the damage dealt. 

As a bonus action, the creeping statue can give itself the petrified condition until the end of it's next turn.

As a reaction the creeping statue can move up to half it's speed towards a hostile creature.