Seraph of Scorched Earth

Aftershock {1}{w}{r} (You may cast this spell for its aftershock cost with mana produced by lands. If you do, lands that produced that mana become Wastes.)
Flying, first strike
When Seraph of Scorched Earth enters play, it deals damage to target creature equal to the amount of mana spent to cast it.
An angel's fire is both weapon and wonder.