Sister Friede

First Strike
{t}, {2}{u}: Put a -2/-2 marker on target creature an
opponent controls and tap it. It doesn't untap on
your opponent's next untap phase.
Whenever Sister Friede dies, you can pay
{3}{u}{p/b}{p/b}. If you do, place
Blackflame Friede on the battlefield from exile.
Return from whence thou cam'st.