Earthcraft, Fertile Ground, and Morphling

Prerequisites

• Earthcraft on the battlefield
• Fertile Ground on the battlefield
• Morphling on the battlefield

Steps

1. Activate the basic land with Fertile Ground attached by tapping it, adding at least
2. Fertile Ground triggers, adding
3. Activate Earthcraft by tapping Morphling, untapping the basic land
4. Activate Morphling's first ability by paying , untapping it
5. Repeat
6. If the basic land is an Island, you may add mana of any color using Fertile Ground's trigger, and you may infinitely repeat steps 3-4 with any other basic land you control

Results

• Infinite colored mana
• Infinite untap of basic lands you control