Yenna, Redtooth Regent, Nature's Chosen, and Thaumatog

Prerequisites

• Yenna, Redtooth Regent on the battlefield
• Nature's Chosen on the battlefield
• Thaumatog on the battlefield
• You control a creature, artifact, or land that can produce at least
• Yenna does not have summoning sickness

Steps

1. Activate the mana-producing permanent by tapping it, adding at least
2. Activate Yenna by paying 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 , 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 , this combo produces infinite mana that artifacts, creatures, and lands you control can produce

Results

• Infinitely large Thaumatog until end of turn
• Infinite mana lands, artifacts, and creatures you control can produce
• Infinite scry