Rings of Brighthearth + Seeker of Skybreak + Circle of Dreams Druid

Rings of Brighthearth

Seeker of Skybreak

Circle of Dreams Druid

How it works

1. Activate Circle of Dreams Druid by tapping it, adding at least .
2. Activate Seeker of Skybreak by tapping it, targeting itself.
3. Rings of Brighthearth triggers, causing you to pay 2 to copy Seeker of Skybreak's ability, targeting Circle of Dreams Druid.
4. Resolve both Seeker of Skybreak abilities, untapping it and Circle of Dreams Druid.
5. Repeat.

This loop is all about amplifying an activated untap effect to repeatedly harvest massive amounts of green mana. By tapping Circle of Dreams Druid, you generate a surplus of green mana based on your board state, which easily covers the costs required to keep the engine moving. When you activate Seeker of Skybreak to untap itself, Rings of Brighthearth steps in as a critical amplifier: for just two generic mana, it copies that untap ability so you can also untap the Druid simultaneously. This creates a self-sustaining cycle that yields infinite untaps and infinite green mana.