Morophon, the Boundless + Sliver Overlord + Mana Echoes + Fist of Suns

Morophon, the Boundless

Sliver Overlord

Mana Echoes

Fist of Suns

How it works

1. Activate Sliver Overlord by paying 3, searching your library for any Sliver creature card and putting it into your hand.
2. Cast the Sliver by paying 0 due to Morophon and Fist of Suns.
3. When the Sliver enters the battlefield, Mana Echoes triggers, adding at least CCC.
4. Repeat.

This dazzling hive-mind loop centers on Morophon, the Boundless, whose chosen creature type makes your Sliver spells cost five colored mana less to cast. Because every Sliver is also a Changeling, they trigger Mana Echoes upon entering the battlefield to generate a flood of colorless mana, which you can easily filter into all five colors to satisfy Fist of Suns' alternative cost of {W}{U}{B}{R}{G}—completely bypassing any traditional mana restrictions. This makes casting your entire deck effortless, allowing Sliver Overlord to continuously tutor every remaining Sliver from your library directly into play to overwhelm the board in a single unstoppable wave.