エンチャント
クリーチャーが1体あなたのコントロール下で戦場に出るたび、クリーチャー1体かプレイヤー1人を対象とする。あなたは


を支払ってもよい。 そうした場合、その戦場に出たクリーチャーは、そのクリーチャーかプレイヤーに、自身のパワーに等しい点数のダメージを与える。
Electropotence is the source of the ability, but the creature is the source of the damage. The ability couldn't target a creature with protection from red, for example. It could target a creature with protection from creatures, but all the damage would be prevented. Since damage is dealt by the creature, lifelink, deathtouch, and wither are taken into account, even if the creature has left the battlefield by the time it deals damage.
Once you decide to pay 
, it's too late for anyone to respond (such as by activating a regeneration ability the targeted creature has).
If you pay 
, the creature that entered deals damage equal to its current power to the targeted permanent or player. If it's no longer on the battlefield, its last known existence on the battlefield is checked to determine its power.
You target a permanent or player when the ability triggers. You decide whether or not to pay 
as the ability resolves.