Ill-Timed Explosion
Sorcery
Oracle Text
Draw two cards. Then you may discard two cards. When you do, Ill-Timed Explosion deals X damage to each creature, where X is the greatest mana value among cards discarded this way.
Flavor Text
Only too late did the Agency custodians realize the device had not been inactive—it was just waiting for the right trigger.
in its mana cost, X is 0.