Whenever Jerren, Corrupted Bishop enters the battlefield or another nontoken Human you control dies, you lose 1 life and create a 1/1 white Human creature token.
: Target Human you control gains lifelink (Damage dealt by the creature also causes its controller to gain that much life.)
until end of turn.
At the beginning of your end step, if you have exactly 13 life, you may pay
. If you do, transform Jerren.