Sunforger + Final Fortune + Angel's Grace + Wheel of Sun and Moon

Sunforger

Final Fortune

Angel's Grace

Wheel of Sun and Moon

How it works

1. Activate Sunforger by paying and unattaching it, searching your library for Final Fortune and casting it without paying its mana cost.
2. Resolve Final Fortune, causing you to take an extra turn after this one and shuffle Final Fortune into your library due to Wheel of Sun and Moon.
3. Move to your next turn.
4. Activate Sunforger's equip ability by paying 3, attaching it to a creature you control.
5. Repeat steps 1 through 3 one additional time.
6. Activate Sunforger's equip ability by paying 3, attaching it to a creature you control.
7. Activate Sunforger by paying and unattaching it, searching your library for Angel's Grace and casting it without paying its mana cost.
8. Resolve Angel's Grace, preventing you from losing the game this turn and shuffle Angel's Grace into your library due to Wheel of Sun and Moon.
9. At the beginning of your end step, Final Fortune triggers, however you cannot lose the game due to Angel's Grace.
10. Repeat from step 4.