Rootha, Mercurial Artist + Sneak Attack + Mana Geyser

Rootha, Mercurial Artist

Sneak Attack

Mana Geyser

How it works

1. Cast Mana Geyser by paying 3.
2. Holding priority, activate Rootha by paying 2 and returning it from the battlefield to your hand, copying Mana Geyser.
3. Resolve the copy of Mana Geyser, adding at least .
4. Activate Sneak Attack by paying , putting Rootha from your hand onto the battlefield.
5. Repeat from step 2.
6. If opponents control four or more tapped lands, this combo nets infinite red mana.