Yenna, Redtooth Regent + Nature's Chosen + Thaumatog

Yenna, Redtooth Regent

Nature's Chosen

Thaumatog

How it works

1. Activate the mana-producing permanent by tapping it, adding at least 2.
2. Activate Yenna by paying 2 and tapping it, creating a token copy of Nature's Chosen attached to Yenna, untapping Yenna, and scrying 2.
3. Activate the Nature's Chosen token's second ability by tapping Yenna, untapping the mana-producing permanent.
4. Activate the Nature's Chosen token's first ability by paying 0, untapping Yenna.
5. Activate Thaumatog's second ability by sacrificing the Nature's Chosen token, causing Thaumatog to get +1/+1 until end of turn.
6. Repeat any number of times.
7. If the mana-producing permanent can produce at least 3, this combo produces infinite mana that artifacts, creatures, and lands you control can produce.

This clever loop hinges on Yenna, Redtooth Regent's ability to duplicate enchantments, using Nature's Chosen to constantly untap Yenna and keep the engine turning. Because Nature's Chosen can be attached to Yenna and sacrifice its own cloning utility for value, Thaumatog is waiting in the wings to devour the resulting token copies for a massive, game-ending power boost. Meanwhile, an external mana-producing permanent provides the necessary fuel for Yenna's activation cost, turning untap loops into infinite resources.