Slogurk, the Overslime + Primal Prayers + Psychic Frog + Decoction Module

Slogurk, the Overslime

Primal Prayers

Psychic Frog

Decoction Module

How it works

1. Activate Psychic Frog by discarding a land card.
2. Slogurk triggers, putting a +1/+1 counter on it.
3. Resolve the Psychic Frog 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 your graveyard and a steady stream of energy into a perpetual motion machine, fueled by Psychic Frog discarding land cards to pump its stats while automatically growing Slogurk, the Overslime with +1/+1 counters. When Slogurk hits its threshold, you bounce it back to your hand, triggering its ability to return all those discarded lands right back to you. Thanks to Primal Prayers letting you bypass mana costs using energy, combined with the extra energy generated by Decoction Module every time Slogurk re-enters the battlefield, you can recast your ooze over and over again for free.