Contract with Jaz'gol

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, target creature gets -X/-X until end of turn, where X
is the amount of life you would lose, instead.
Whenever a creature an oponent controls dies,
create a treasure token.