Quote from genini2 »Quote from TheBeardedFool »
I'm not 100%. I know there is some weird rule regarding it not mattering what source put a card in exile as long as it still ends up there, but I'm not sure if that is applicable in this case.
It doesn't work. Karn's Temporal Sundering exiles itself prior to resolution. Feather the redeemed has the stipulation that it must be exiled to its replacment ability in order for it to work.
That's due to the "if you do", I presume?