Hi, I cast a Spike Feeder, remove one +1/+1 counter to gain 2 life.. can the opponent respond with a revolted fatal push to kill the feeder before I could remove the second +1/+1 counter from it?
Once you activate Spike Feeder's second ability, it will get to resolve even if Spike Feeder leaves the battlefield in the meantime (whether by Fatal Push or otherwise) (C.R. 113.7a). Thus, if you activate that ability twice this way, you will still gain 4 life when they resolve, even if Spike Feeder leaves the battlefield before you do so. See also this thread.
In fact, after you activate Spike Feeder's second ability once, while you have priority, you will have priority to activate that ability again right away (C.R. 117.1b, 117.3c). See also this thread.
Also, by removing the second counter to activate the ability again, the Feeder will die before you regain priority, and before the ability resolves, because state based actions send it to the graveyard for having 0 toughness right after you've finished the activation process.
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In fact, after you activate Spike Feeder's second ability once, while you have priority, you will have priority to activate that ability again right away (C.R. 117.1b, 117.3c). See also this thread.
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Nexus MTG News // Nexus - Magic Art Gallery // MTG Dual Land Color Ratios Analyzer // MTG Card Drawing Odds Calculator
Want to play a UW control deck in modern, but don't have jace or snaps?
Please come visit us at the Emeria Titan control thread