Rykard, Lord of Blasphemy

At the start of your end step, target opponent
gains control of up to one target creature you
own until Rykard, Lord of Blasphemy leaves
the battlefield. That creature gains vigilance
and must attack or block each combat if able.
Whenever a creature you own dies, If it was
dealt damage by a creature you own this
turn, draw X cards and gain X life, where X is
that creature's toughness.