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does the -1/-1 placed on a creature trigger the effect on 'Hapatra, Vizier of Poisons'. The section of the card which states 'When you put one or more -1/-1 counterson a creature'.

marked as duplicate by GendoIkari magic-the-gathering Apr 11 at 18:20

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A counter is a specific thing; which has no relationship to a creature gaining or losing power and toughness because of effects like Tragic Slip's.

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