Jerren, Corrupted Bishop

Legendary Creature — Human Cleric // Legendary Creature — Demon

Whenever Jerren enters or another nontoken Human you control dies, you lose 1 life and create a 1/1 white Human creature token. {2}: Target Human you control gains lifelink until end of turn. At the beginning of your end step, if you have exactly 13 life, you may pay {4}{B}{B}. If you do, transform Jerren.