Underworld Breach + Squandered Resources + Splendid Reclamation + Windfall

Underworld Breach

Squandered Resources

Splendid Reclamation

Windfall

How it works

1. Activate Squandered Resources by sacrificing at least seven lands, adding 5.
2. Cast Windfall either from your hand by paying 2, or from your graveyard for its escape cost by paying 2 and exiling three nonland cards except Splendid Reclamation from your graveyard, causing each player to discard their hand and draw cards equal to the greatest number a player discarded this way.
3. Cast Splendid Reclamation from your graveyard for its escape cost by paying 3 and exiling three nonland cards except Windfall from your graveyard, returning all land cards from your graveyard to the battlefield tapped.
4. Repeat.
5. Depending on the number of cards in a player's hand and/or in your graveyard when Windfall resolves, you may be able to omit casting it during an iteration.

This brilliant loop turns your graveyard into a self-sustaining engine by letting Underworld Breach grant escape to your key sorceries, while Squandered Resources fuels your mana supply by sacrificing all your lands for whatever colors you need. Once your library and graveyard are churning, Windfall keeps your hand perpetually filled with fresh answers and combo pieces by leveraging the opponents' high card counts. Finally, Splendid Reclamation scoops all those sacrificed lands right back onto the battlefield, ensuring Squandered Resources always has plenty of timber to chop down for the next iteration.