Putrid Scent. Any creature that moves within 5ft of the Undead Centaur must succeed a DC 14 Con save or be poisoned for 1 minute, if the creature passes this save it is immune for 24hrs.

Violent Death. When the Undead Centaur's HP hits 0 any creature within 5ft of it must make a DC 14 Dex save or suffer 4d6 necrotic damage as the Centaur's guts explode violently.

Hooked. If the Undead Centaur has successfully hit a creature with its Hooking Sickle. attack it can drag them with its movement. This halves its movement and it cannot use its Charging Swings. attack. However it forcibly moves them with it and deals 1 piercing damage for each 5ft it covers.

Charging Swings. The Undead Centaur charges forward up to a quarter of its movement for free, but still takes attacks of opportunity with disadvantage against it. If it passes an enemy it can swing its blades at it, or if it ends its charge within another creature's space it may also attack the creature: Melee Weapon Attack: +4 to hit, reach of 5ft. Up to 2 targets (One may be attacked in passing) Hit: 8 (2d6+4) [Slashing] Damage.

Hooking Sickle. Melee Weapon Attack: +4 to hit, reach 5 ft. 1 target. Hit: 5 (1d8 + 2) [Piercing] damage. 

Axe. Melee Weapon Attack: +4 to hit, reach 5ft. 1 target. Hit: 8 (1d10+6)

N/A

Festering Kick. The Undead Centaur reactively kicks once per round against an attacker that is behind it, this has no bonus to hit and deals 2 [Bludgeoning] and 2 [Poison] damage.