How Cumulative Upkeep works is that during your upkeep, you place an "age counter" on the card and then pay the Cumulative Upkeep cost for each age counter on the card
Knowing what to look for can save you from purchasing fake cards, preserving the value of your genuine collection, and ensuring a fair playing experience in the Pokmon Trading Card Game
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III Whenever an Elf you control attacks this turn, target creature an opponent controls gets -1/-1 until end of turn

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