Valstrax, Sudden Comet

When you cast this spell, you may exile it instead. If you do, it enters the battlefield at the beginning of your next upkeep.
When Vaslstrax, Sudden Comet enters the battlefield, if it entered from exile, it deals 4 damage to each creature without flying.
Flying, Double Strike
{u}{u}{u}: Valstrax, Sudden Comet can't be blocked by creatures with flying or reach this turn. At the beginning of your next end step, return Valstrax, Sudden Comet to your hand.