Othara, Merciful Butcher

First strike, lifelink, indestructible
Othara, Merciful Butcher isn't a creature as long
as there are less than five creature cards total between all graveyards.
{2}{w}{r}, Sacrifice another creature: Othara deals
4 damage to target creature or planeswalker and you gain 4 life.
Under Bolas' reign, many pray for the end.