Rootha, Mercurial Artist + Sneak Attack + Mana Geyser
Rootha, Mercurial Artist
Sneak Attack
Mana Geyser
Requires
Rootha, Mercurial Artist must be on the battlefield.
Sneak Attack must be on the battlefield.
Mana Geyser must be in hand.
Opponents control at least three tapped lands.
Mana needed: 
Steps
- Cast Mana Geyser by paying
. - Holding priority, activate Rootha by paying
and returning it from the battlefield to your hand, copying Mana Geyser. - Resolve the copy of Mana Geyser, adding at least .
- Activate Sneak Attack by paying , putting Rootha from your hand onto the battlefield.
- Repeat from step 2.
- If opponents control four or more tapped lands, this combo nets infinite red mana.
Results
Infinite ETB. Infinite LTB. Infinite magecraft triggers. Infinite red mana.
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