Mana Cannons
{2}{R}
Enchantment
Oracle Text
Whenever you cast a multicolored spell, this enchantment deals X damage to any target, where X is the number of colors that spell is.
Watch Out
Cast trigger fires even if counteredWatch Out
This triggers when the spell is cast, before it resolves. Even if the spell is countered, the cast trigger still resolves. Copies of spells are not cast, so they won't trigger this.