Kenrith, the Returned King + Great Whale + Yahenni, Undying Partisan

Kenrith, the Returned King

Great Whale

Yahenni, Undying Partisan

How it works

1. Activate up to seven lands by tapping them, adding at least 4.
2. Activate Kenrith's fifth ability by paying 4, returning Great Whale from your graveyard to the battlefield.
3. When Great Whale enters the battlefield, it triggers, untapping up to seven lands.
4. Activate Yahenni by sacrificing Great Whale.
5. Repeat.

This elegant loop relies on Kenrith, the Returned King's black activation to repeatedly pull Great Whale straight out of your graveyard and back onto the battlefield. Each time the whale arrives, its triggered ability untaps your lands to refund the mana spent, with any excess lands generating infinite mana of any color your lands can produce. Yahenni, Undying Partisan acts as the vital sacrifice outlet to send the whale back to the graveyard, growing larger with infinite death triggers along the way.