Dr. Betruger, Hell's Prophet

Whenever Dr. Betruger, Hell's Prophet enters the battlefield 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 Dr. Betruger.