Slogurk, the Overslime + Primal Prayers + Aetherstorm Roc + Prognostic Sphinx

Slogurk, the Overslime

Primal Prayers

Aetherstorm Roc

Prognostic Sphinx

How it works

1. Activate Prognostic Sphinx by discarding a land card.
2. Slogurk triggers, putting a +1/+1 counter on it.
3. Resolve the Prognostic Sphinx ability.
4. Repeat from step 1 two additional times.
5. Activate Slogurk by removing three +1/+1 counters from it, returning it from the battlefield to your hand.
6. When Slogurk leaves the battlefield, it triggers, returning three land cards from your graveyard to your hand.
7. Cast Slogurk by paying E due to Primal Prayers.
8. When Slogurk enters, Aetherstorm Roc triggers, causing you to get E.
9. Repeat.

This fascinating loop transforms the modest discard outlet of Prognostic Sphinx into a self-sustaining engine by feeding land cards directly into your graveyard to continuously grow Slogurk, the Overslime. Once Slogurk accumulates enough growth to bounce itself back to your hand, its departure triggers a massive return of those discarded lands right back to you, which in turn fuels an infinite cycle of cheap creature casts enabled by Primal Prayers. Meanwhile, Aetherstorm Roc quietly watches the procession, turning every single one of Slogurk's dramatic entrances into a fresh stream of energy counters that keeps the entire magical machinery humming.