Rin, Immortality Seeker

Heroic—Whenever you cast a spell that targets
Rin, Immortality Seeker, you get {e}{e}.
Pay {e}{e}: Target creature gets -1/-1 and Rin
gets +1/+1.
Pay {e}{e}{e}: Draw a card you lose 1 life.
Pay {e}{e}{e}{e}: Rin gains double strike
until end of turn.
Pay {e}{e}{e}{e}{e}{e}{e}{e}{e}{e}: Transform Rin.