This clever loop centers around Grazing Kelpie and its persist ability, which normally would exhaust itself after a single resurrection due to the -1/-1 counter it accumulates. However, whenever Grazing Kelpie leaves your graveyard, Hardened Academic triggers to place a +1/+1 counter on a creature you control, which immediately cancels out the persist penalty when applied to the Kelpie. By using Viscera Seer to sacrifice the Kelpie, you not only trigger the infinite sacrifice and death loops needed to fuel your strategy, but you also get to continuously scry through your library while keeping your creature permanently revitalized on the battlefield.