Slogurk, the Overslime + Primal Prayers + Guide of Souls + Witch-king of Angmar

Slogurk, the Overslime

Primal Prayers

Guide of Souls

Witch-king of Angmar

How it works

1. Activate Witch-king of Angmar by discarding a land card.
2. Slogurk triggers, putting a +1/+1 counter on it.
3. Resolve the Witch-king of Angmar 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, Guide of Souls triggers, causing you to get E and gain 1 life.
9. Repeat.

This ingenious loop uses Primal Prayers to bypass Slogurk, the Overslime’s mana cost entirely by paying energy instead, letting you recast the legendary ooze at instant speed. Each time Slogurk leaves the battlefield, its triggered ability recycles the land cards you've discarded to fuel Witch-king of Angmar's activated ability, which in turn feeds +1/+1 counters right back onto Slogurk so it can bounce itself home. Meanwhile, Guide of Souls watches these endless iterations unfold to pile up a massive life total and generate a limitless supply of energy to keep the entire engine running.