Nyx, Vile Tormentor

Cumulative upkeep - Pay 1 life.
Hexproof

When Nyx, Vile Tormentor enters the battlefield
return target creature an opponent controls to its
owner's hand. You may have target creature you
control become a copy of that creature.
During your upkeep, put a token that's a copy of
another target creature onto the battlefield for
each age counter on Nyx, Vile Tormentor.