Effect
Target 1 card you control; this turn, when any monster effect resolves that targeted that card at activation, negate that effect. During either player's turn, except the turn this card was sent to the Graveyard: You can banish this card from your Graveyard, then target 1 card you control; this turn, when any monster effect resolves that targeted that card at activation, negate that effect.
"Skill Prisoner" is an effect that targets 1 card you control. (This also applies when activating the effect by banishing "Skill Prisoner" from your Graveyard.)
When activating the effect of "Skill Prisoner" from the Graveyard, you banish this card from the Graveyard as a cost.
"Skill Prisoner" cannot be activated during the Damage Step. (This also applies when activating the effect by banishing "Skill Prisoner" from your Graveyard.) However, the effect of a "Skill Prisoner" that has already been activated will still be applied during the Damage Step.
If a monster effect is activated targeting the card that is being targeted by "Skill Prisoner," the resolution of all monster effects activated that turn—whether activated by you or your opponent—will be negated.
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