The Night King

Deathtouch, indestructible
When The Night King enters the battlefield, put
all creature cards from all graveyards onto the battlefield under your control. Those creatures
are Zombies in addition to their other types.
Then, destroy all non-Zombie creatures you
control.
{x}{b}{g}, {t}: Return X target creature cards from graveyards to the battlefield under your control.
Those creatures are Zombies in addition to
their other types.