Dr. マジソン・リー

あなたがアーティファクト・呪文１つを唱えるたび、{E}を得る。
{T}, {E}を支払う：クリーチャー１体を対象とする。ターン終了時まで、それは＋１/＋０の修整を受けトランプルと速攻を得る。
{T}, {E}{E}{E}を支払う：カード１枚を引く。
{T}, {E}{E}{E}{E}{E}を支払う：あなたの墓地にあるアーティファクト・カード１枚を対象とする。それをタップ状態で戦場に戻す。

麦蒂森·黎博士

每当你施放神器咒语时，你得到{E}。
{T}，支付{E}：直到回合结束，目标生物得+1/+0且获得践踏与敏捷异能。
{T}，支付{E}{E}{E}：抓一张牌。
{T}，支付{E}{E}{E}{E}{E}：将目标神器牌从你的坟墓场横置移回战场。

Dr. Madison Li

Whenever you cast an artifact spell, you get {E} (an energy counter).
{T}, Pay {E}: Target creature gets +1/+0 and gains trample and haste until end of turn.
{T}, Pay {E}{E}{E}: Draw a card.
{T}, Pay {E}{E}{E}{E}{E}: Return target artifact card from your graveyard to the battlefield tapped.

Fallout

Whenever you cast an artifact spell, you get {E}.
{T}, Pay {E}: Target creature gets +1/+0 and gains trample and haste until end of turn.
{T}, Pay {E}{E}{E}: Draw a card.
{T}, Pay {E}{E}{E}{E}{E}: Return target artifact card from your graveyard to the battlefield tapped.

Energy counters aren’t mana. They don’t go away as steps, phases, and turns end, and effects that add mana “of any type” can’t give you energy counters.

Dr. Madison Li’s first ability resolves before the spell that caused it to trigger.

Energy counters are a kind of counter that a player may have. They’re not associated with any specific permanents.

If a spell or ability with one or more targets states that you “may pay” some amount of {E}, and each permanent that it targets has become an illegal target, the spell or ability won’t resolve. You can’t pay any {E} even if you want to.

If an effect says you get one or more {E}, you get that many energy counters. To pay one or more {E}, you lose that many energy counters. You can’t pay more energy counters than you have. Any effects that interact with counters a player gets, has, or loses can interact with energy counters.

Keep track of how many energy counters each player has. Potential ways to track this include writing them down on paper or using dice, but any method that is clear and mutually agreeable is fine. (At higher levels of tournament play, dice may not be allowed for tracking counters that players have.)

Some spells and abilities that give you {E} may require targets. If each target chosen is an illegal target as that spell or ability tries to resolve, it won’t resolve. You won’t get any {E}.

Some triggered abilities state that you “may pay” a certain amount of {E}. You can’t pay that amount multiple times to multiply the effect. You simply choose whether or not to pay that amount of {E} as the ability resolves.

Some triggered abilities that state that you “may pay” a certain amount of {E} describe an effect that happens “If you do.” In that case, no player may take actions to try to stop the ability’s effect after you make your choice. If the payment is followed by the phrase “When you do,” then you’ll choose any targets for that reflexive triggered ability and put it on the stack before players can take actions.

{E} is the energy symbol. It represents one energy counter.