I know this is a leak rather than an official spoiler, but since this seems to be confusing people I'm like 99% sure that you can't just cast Ancestral Recall. My guess is that ability it tied to the creature being prepared. So play the creature, pay one to Ancestral and then you'll need to prepare again by exiling eight cards from your graveyard if you want to do it again. At least that's my guess.
@FontMasterFlex7@SaffronOlive Seems like you want a vanilla 2/2 to swing into a 2/1 and anything beyond that is too much, once again, play a different game