Tawnos's Coffin + Boonweaver Giant + Nature's Chosen + Treachery

Tawnos's Coffin

Boonweaver Giant

Nature's Chosen

Treachery

How it works

1. Cast Boonweaver Giant for 6.
2. Boonweaver Giant enters the battlefield, searching your library for Nature's Chosen and attaching it to itself, then shuffling.
3. Activate Nature's Chosen's last ability by tapping Boonweaver Giant, targeting Tawnos's Coffin.
4. In response, activate Tawnos's Coffin by paying 3 and tapping it, exiling Boonweaver Giant and all Auras attached to it and creating a delayed trigger ability.
5. Resolve the Nature's Chosen ability, untapping Tawnos's Coffin.
6. Resolve Tawnos's Coffin's delayed trigger from step 4, returning Boonweaver Giant from exile to the battlefield tapped and returning all Auras exiled in step 4 to the battlefield attached to Boonweaver Giant.
7. Boonweaver Giant enters the battlefield, searching your library for Treachery and attaching it to itself.
8. Treachery enters the battlefield, untapping five lands.
9. Tap those lands to add at least 4.
10. Activate Nature's Chosen's first ability by paying 0, untapping Boonweaver Giant.
11. Repeat from step 3, searching for the Aura of your choice in step 7 instead of Treachery.