Cast Jeska's Will by paying ({2} magic symbol) ({R} magic symbol) .
Holding priority, activate Rootha by paying ({2} magic symbol) and returning it from the battlefield to your hand, copying Jeska's Will.
Resolve the copy of Jeska's Will, adding at least ({R} magic symbol) ({R} magic symbol) ({R} magic symbol) .
Activate Sneak Attack by paying ({R} magic symbol) , putting Rootha from your hand onto the battlefield.
Repeat from step 2.
If an opponent has four or more cards in hand, this combo nets infinite red mana.
If you control your commander, you may also select both of Jeska's Will's modes when casting it to exile your library with the ability to play the exiled cards this turn.