Contract with Ur'onuz

Contract (Starts outside the game face up. Can't be
cast. If it would leave the battlefield, exile it instead.
At the end of your turn, sacrifice this card.)
During your turn, if you would lose life, create
a X/X black Horror creature token, where X is
the amount of life you would lose, instead.
Whenever a Horror enters the battlefield under
your control, each oponent loses 2 life.