Durnehviir, Death's Gift

Eminence — As long as The Durnehviir, Death's
Gift is in the command zone or on the battlefield, at the beginning of your upkeep, you lose 2 life.
Whenever a non-land permanent you control
causes you to lose life, each opponent loses
double that much life.
Flying, Trample
The dying of a dragon brings enough death to kill ten
more dragons.