Sunforger + Chance for Glory + Angel's Grace + Mistveil Plains + Sword of Feast and Famine

Sunforger

Chance for Glory

Angel's Grace

Mistveil Plains

Sword of Feast and Famine

How it works

1. Activate Sunforger by paying and unattaching it, searching your library for Chance for Glory and casting it without paying its mana cost.
2. Resolve Chance for Glory, causing you to take an extra turn after this one and lose the game at the beginning of that turn's end step.
3. Activate Mistveil Plains by paying and tapping it, putting Chance for Glory on the bottom of your library from your graveyard.
4. Activate Sunforger's equip ability by paying 3, attaching it to any creature you control.
5. Move to your next turn.
6. Activate Sunforger by paying and unattaching it, searching your library for Angel's Grace and casting it without paying its mana cost.
7. Resolve Angel's Grace, causing you to be unable to lose the game this turn.
8. Activate Mistveil Plains by paying and tapping it, putting Angel's Grace on the bottom of your library from your graveyard.
9. Deal combat damage to an opponent using the creature that has Sword of Feast and Famine attached.
10. Sword of Feast and Famine triggers, causing the defending player to discard a card and you to untap all lands you control.
11. Activate Sunforger's equip ability by paying 3, attaching it to any creature you control.
12. Repeat.

This brilliant engine locks down infinite turns by weaponizing Sunforger to repeatedly tutor up and cast Chance for Glory, while Mistveil Plains quietly recycles every spell right back to the bottom of your library to keep the chain unbroken. Because Chance for Glory comes with a lethal delayed trigger at the end of each extra turn, Angel's Grace steps in as the ultimate safety net, preventing you from losing the game while also being conveniently loopable through Mistveil Plains. Meanwhile, Sword of Feast and Famine ensures you never run short on mana, untapping your lands upon dealing combat damage so you can easily pay for re-equipping Sunforger and activating your recursion pieces.