Tangleroot + Words of Wind + Ornithopter + Soul of the Harvest

Tangleroot

Words of Wind

Ornithopter

Soul of the Harvest

How it works

1. Cast Ornithopter by paying 0.
2. Tangleroot triggers, adding .
3. When Ornithopter enters the battlefield, Soul of the Harvest triggers.
4. Holding priority, activate Words of Wind by paying 1, replacing the next card you draw.
5. Resolve the Soul of the Harvest trigger, causing you to return Ornithopter from the battlefield to your hand, and causing each opponent to return a permanent they control from the battlefield to your hand.
6. Repeat.

This loop relies on transforming free resources and card draw into a merciless one-sided bounce engine. You cast Ornithopter for zero mana, immediately fueling Tangleroot's green mana generation to help pay for Words of Wind's replacement effect. That activated ability primes your upcoming draw, so when Soul of the Harvest triggers upon the thopter's arrival, you trade that card draw to bounce Ornithopter back to your hand alongside every single permanent your opponents control. Because Ornithopter costs nothing to recast, you can repeat this entire sequence infinitely to strip the board clean while generating infinite storm and creature triggers.