rare yugioh card Starfoil | Yu-Gi-Oh! Wiki Explaining EVERY Yu-Gi-Oh Rarity Ever

There can be at most 3 copies of each card across all of each team's Decks

If Cursed Wombat leaves the battlefield while a spell or ability that would put one or more +1/+1 counters on one or more permanents you control is still on the stack, those permanents won't have the additional ability granted by Cursed Wombat when those counters would be put on those permanents, so that additional ability won't trigger

It also doesnt negate those monsters effects, so you can use it yourself when needed

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