Black LeBrontus, Grace Striver

Flying, Trample
Whenever Black LeBrontus, Grace Striver enters
the battlefield, add 3 mana of any single color.
Black LeBrontus, Grace Striver power is X.
Whenever another flying creature enters the battlefield, you may pay {2} {r/g}{r/g}{r/g}. If you do,
other creatures under your control gain
+X/+0 until the end of turn, unless
your opponent pays X.
"You can't be afraid to fail. It's the only way
you succeed ."