Rootha, Mercurial Artist, Early Harvest, and Winding Canyons

Prerequisites

• Rootha, Mercurial Artist on the battlefield
• Early Harvest in hand
• Winding Canyons on the battlefield
• available

Steps

1. Activate Winding Canyons by paying and tapping it, allowing you to cast creature spells as though they have flash this turn
2. Activate any number of basic lands by tapping them, adding at least
3. Cast Early Harvest by paying
4. Holding priority, activate Rootha by paying and returning it from the battlefield to your hand, copying Early Harvest Resolve the Early Harvest copy, untapping all basic lands you control
5. Activate any number of basic lands by tapping them, adding at least
6. Cast Rootha by paying
7. Repeat from step 4

Results

• Infinite LTB
• Infinite ETB
• Infinite storm count
• Infinite magecraft triggers
• Infinite mana basic lands you control can produce
• Infinite untap of basic lands you control