Legolas's Quick Reflexes, Cacophodon, and Earthcraft

Prerequisites

• Legolas's Quick Reflexes in hand
• Cacophodon on the battlefield
• Earthcraft on the battlefield
• You have a way to give Cacophodon indestructible
• You control at least one basic land
• if the basic land is not a Forest available

Steps

1. If you control a basic Forest, activate it by tapping it, adding
2. Cast Legolas's Quick Reflexes by paying , targeting Cacophodon
3. Give Cacophodon indestructible, if needed
4. Activate Earthcraft by tapping Cacophodon
5. Cacophodon triggers, dealing damage equal to its power to itself
6. Cacophodon triggers, untapping itself
7. Resolve the Earthcraft ability, untapping a basic land you control
8. Activate the basic land by tapping it, adding
9. Repeat from step 4

Results

• Infinite mana basic lands you control can produce
• Infinite untap of basic lands you control