Devastating Onslaught + Mana Geyser + Vampire Charmseeker

Devastating Onslaught

Mana Geyser

Vampire Charmseeker

How it works

1. Cast Mana Geyser by paying 3, adding for each tapped land your opponents control.
2. Cast Devastating Onslaught by paying 4, creating two token copies of Vampire Charmseeker with haste.
3. When the Vampire Charmseeker tokens enter, they trigger, returning Mana Geyser and Devastating Onslaught from your graveyard to your hand.
4. Repeat.

This explosive red loop relies on a brilliant recycling chain: you cast Mana Geyser to harvest a massive surge of red mana from your opponents' tapped lands, which then funds Devastating Onslaught. When Devastating Onslaught resolves to clone Vampire Charmseeker twice, the resulting pair of entering creatures trigger their own abilities to pluck both Mana Geyser and Devastating Onslaught right back out of your graveyard and into your hand. Because those Vampire Charmseeker tokens are swiftly sacrificed at the end step, you can effortlessly recast everything over and over again, generating an infinite storm count and endless red mana along the way.