Onvask, Ruler of the Free

Tyranny —Whenever you attack or block with a creature you own, if Onvask, Ruler of the Free
is in the command zone or on the battlefield, you
lose 1 life.
Whenever a creature an opponent controls attacks
you, you may pay 10 life, if you do gain control of
that creature at the end of combat.
Creatures you control but don't own have trample and lifelink.