Diana, Scorn of the Moon

First strike, nightfall (If Diana is not the first card you cast this turn, you may force a creature your opponent controls to block Diana this turn.)

If you activate another nightfall ability this turn, you may force another creature your opponent controls to block Diana this turn.

Level up (If you've activated nightfall 4 or more times, grant Diana +1/+1 and "When you activate nightfall give Diana +2/+0 this round.)