Faeburrow Elder, and High Alert

Prerequisites

• Faeburrow Elder on the battlefield
• High Alert on the battlefield
• Faeburrow Elder does not have summoning sickness
• You control a black and a red permanent

Steps

1. Activate Faeburrow Elder by tapping it, adding
2. Activate High Alert by paying , untapping Faeburrow Elder
3. Repeat

Results

• Infinite red mana
• Infinite green mana
• Infinite black mana