Death. Death is, well... Death. As a bonus action, Death can target a creature, dead or alive, and either make the creature drop dead, or spring to life. When making a creature die, something must happen to make said creature die. for example, the creature is on a a balcony, it falls. Or, the creature is old, it dies when it takes its next long rest.

Scythe. Melee Weapon Attack: +20 to hit, reach 10 ft., 3 target. Hit:  5d10 + 14 Force and Necrotic damage. 

Whisper. RangedWeapon Attack: creature must be looking at Death or a symbol of Death such as a corpse, range indefinite, 1 target. Hit: 1,000,000,000 Force and Necrotic damage.

Reaction Name. If a creature attacks Death, it does absolutely f**king nothing to Death.

Death can use a legendary action anytime it wants.¯\_(ツ)_/¯

Riseth Army (Costs 1 Bonus Action). Death summons as many corpses and Grims as it wants. Death controls the summoned creatures.