Destroy target artifact with mana value X. It can't be regenerated. Detonate deals X damage to that artifact's controller.

Spend only black mana on X.

Drain Life deals X damage to any target. You gain life equal to the damage dealt, but not more life than the player's life total before the damage was dealt, the planeswalker's loyalty before the damage was dealt, or the creature's toughness.

This spell costs more to cast for each target beyond the first.

Fireball deals X damage divided evenly, rounded down, among any number of targets.

Hurricane deals X damage to each creature with flying and each player.

Counter target spell unless its controller pays . If that player doesn't, they tap all lands with mana abilities they control and lose all unspent mana.

Target player gains X life.

Tap X target creatures. Winter Blast deals 2 damage to each of those creatures with flying.