Displacer Kitten + Great Whale + Forced Worship

Displacer Kitten

Great Whale

Forced Worship

How it works

1. Activate up to seven lands you control by tapping them, adding at least 3.
2. Cast Forced Worship by paying its mana cost, targeting Displacer Kitten
3. Displacer Kitten triggers, blinking Great Whale.
4. When Great Whale enters the battlefield, it triggers, untapping up to seven lands.
5. Resolve the Forced Worship spell.
6. Activate Forced Worship by paying 2, returning it from the battlefield to your hand.
7. Repeat.

This loop relies on a clever bit of mana-positive recycling: by leveraging Great Whale's massive untap trigger, the seven lands you tap for mana can easily cover both the {3}{W}{W} needed to cast Forced Worship and the {2}{W} activation cost to bounce it right back to your hand. Each iteration of this process is fueled by casting Forced Worship as a noncreature spell, which immediately triggers Displacer Kitten's avoidance ability to blink Great Whale and reset the cycle. Because you are constantly returning the Aura to your hand and replaying it, you generate infinite enter-the-battlefield and leave-the-battlefield triggers while netting an endless surplus of mana from your newly untapping lands.