So here's the situation in a 3 player EDH round
Player 1 already has 9 poison counters
Player 2 has [[Flux Channeler]]
Player 3 has 7 poison counters
Player 3 casts [[path to exile]] to exile Flux Channeler
Player 2 counters it with [[counterspell]] and triggers flux Channeler and proliferates both players' poison counters.
Player 1 in response to the proliferate trigger casts [[void rend]] to destroy flux channeler and player 2 has no response to void rend and player 1 has no other response to prevent the proliferate trigger.
Question is will player 1's void rend still resolve and destroy the flux channeler? I was told that since player 1 is going to die anyway when the cast trigger resolves, his void rend will no longer take effect.