Slogurk, the Overslime + Primal Prayers + Decoction Module + Prognostic Sphinx

Slogurk, the Overslime

Primal Prayers

Decoction Module

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, Decoction Module triggers, causing you to get E.
9. Repeat.

This loop turns Prognostic Sphinx into an efficient burial ground for your lands, using its discard ability to feed Slogurk, the Overslime counter by counter. Once Slogurk has accumulated three +1/+1 counters, you can bounce it back to your hand, triggering its leaves-the-battlefield ability to immediately retrieve all three of those discarded lands. From there, Primal Prayers steps in to let you recast Slogurk using energy instead of mana, which in turn triggers Decoction Module to replenish your energy reserves.