Jegantha, the Wellspring, Gauntlets of Light, and Biomancer's Familiar

Prerequisites

• Jegantha, the Wellspring on the battlefield
• Gauntlets of Light on the battlefield
• Biomancer's Familiar on the battlefield
• Gauntlets of Light attached to Jegantha
• Jegantha does not have summoning sickness

Steps

1. Activate Jegantha by tapping it, adding that cannot be spent to pay generic mana costs
2. Activate Jegantha by paying , untapping it
3. Repeat

Results

• Infinite black mana that cannot be spent to pay generic mana costs
• Infinite blue mana that cannot be spent to pay generic mana costs
• Infinite green mana that cannot be spent to pay generic mana costs
• Infinite red mana that cannot be spent to pay generic mana costs