Selen, Twilight's Apex

Flying, first-strike, ward—Discard a card.
When this creature transforms into Selen,
Twilight's Apex, it deals damage equal to it's
power divided among any number of target
creatures or planeswalkers. Then put two +1/+1 counters in Selen.
Nightbound (If a player cast at least two spells
during their own turn, it becomes day next turn.)