神器生物~組構體
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自行弩炮進戰場時上面有X個+1/+1指示物。
:在自行弩炮上放置一個+1/+1指示物。
從自行弩炮上移去一個+1/+1指示物:它對目標生物或玩家造成1點傷害。
If Walking Ballista has been dealt damage or had its toughness reduced by an effect, this limits how many times you'll be able to remove +1/+1 counters from it in a single turn. For example, if it has three +1/+1 counters on it and has been dealt 1 damage this turn, it will be destroyed immediately after you activate the ability a second time and you won't be able to activate it a third time.