Ethereal State: As a free action, the Reaper can shift a portion of his physical being into the Ethereal plane. This spell-like ability functions exactly like a Blur spell and can be used or dismissed at will. It also allows the Reaper to phase through thin materials such as panes of glass or thin metal bars.
Unescapable: Once per day the Reaper of Nerull can, for 10 minutes, gain a fly speed equal to twice that of their land speed with perfect maneuverability.
Death Siphon: Recently slain creatures improve the Reaper's healing. At the end of the Reapers turn Regenerate 1D4 times the number of corpses.
Legendary Resistance (3/Day). If the dragon fails a saving throw, it can choose to succeed instead.
Withering Touch (1/day): The Aspect of Nerull can curse a creature with less than your Hit Points+ 5 with the Withering Touch. Make a melee touch attack. On a hit, the target must make a DC 20 Constitution Save for the next 5 rounds. Each time the target fails, they receive 8d4 necrotic damage. This ability has no effect against creatures that are not living such as undead and constructs, and has no effect against creatures immune to critical strikes.
Drain Soul (1/day): The Reaper can use Drain Soul on a target with less than the Reapers Hit Points + 5. This requires line of sight and has a 60ft range. The target must make a Constitution Save (20). On a failed save the Reaper gains 2d8 temporary Hit Dice and +2 Str and +2 Dex for the next hour. The Target becomes Stunned for one round, is Blinded for 1d4 rounds and exhausted. This ability has no effect against creatures that are not living such as undead and constructs, and has no effect against creatures naturally immune to critical hits.
Scythe Attack. Melee Weapon Attack: +14 to hit, reach 10 ft., 2 target. Hit: 21 (2d10 + 11) Necrotic damage. On a hit, target makes a DC 20 Con Save. On a fail the target loses 1d4 Dex and gains a point of exhaustion.
Winds of Death. The Aspect of Nerull targets a creature within 60 feet of it. The target must make a DC 20 Constitution saving throw or be pulled 30 feet towards the Aspect of Nerull.
Ethereal Body. The Reaper can choose for a hit to simply phase through him as if it was a miss. The reaper takes no damage unless it is force damage.
Soul Harvest. As a reaction when a creature drops to 0 HP the Reaper can move to creature without provoking opportunity attacks and make an attack on the creature
Ethereal Movement (Costs 1 Action). The Aspect of Nerull moves to an unoccupied space up to 45 feet away without provoking an Attack of Opportunity.
Winds of Death (Costs 1 Action). The Aspect of Nerull uses his Winds of Death bonus action.
Scythe Attack (Costs 1 Action). The Aspect of Nerull makes a Scythe attack.