Ivy, Gleeful Spellthief + Snap + Eternal Witness + Simic Growth Chamber + Gift of Paradise

Ivy, Gleeful Spellthief

Snap

Eternal Witness

Simic Growth Chamber

Gift of Paradise

How it works

1. Activate Simic Growth Chamber and the land with Gift of Paradise attached by tapping them, adding 1.
2. Cast Snap by paying 1, targeting Eternal Witness.
3. Ivy triggers, copying Snap, targeting Ivy.
4. Resolve the copy of Snap, returning Ivy from the battlefield to your hand and untapping Simic Growth Chamber and the land with Gift of Paradise attached.
5. Activate Simic Growth Chamber and the land with Gift of Paradise attached by tapping them, adding 2.
6. Resolve Snap, returning Eternal Witness from the battlefield to your hand and untapping Simic Growth Chamber and the land with Gift of Paradise attached.
7. Cast Ivy by paying .
8. Cast Eternal Witness by paying 1.
9. Eternal Witness enters the battlefield, returning Snap from your graveyard to your hand.
10. Repeat.

This looping engine centers around Ivy, Gleeful Spellthief's ability to automatically duplicate single-target spells, allowing a single casting of Snap to both bounce Eternal Witness and clear Ivy back to your hand. As the original Snap and its copy resolve, they generously untap your lands—specifically Simic Growth Chamber, enhanced by the rainbow mana-fixing of Gift of Paradise—generating a net surplus of mana with every iteration. Once Eternal Witness safely returns to your hand, it can be re-cast to recur Snap from the graveyard, setting up an endless cycle that fuels infinite mana, enters-the-battlefield triggers, and storm count.