Agatha of the Vile Cauldron, Silvanus's Invoker, and Gruul Turf

Prerequisites

• Agatha of the Vile Cauldron on the battlefield
• Silvanus's Invoker on the battlefield
• Gruul Turf on the battlefield

Steps

1. Activate Gruul Turf by tapping it, adding
2. Activate Silvanus's Invoker by paying , untapping Gruul Turf and causing it to become an 8/8 Elemental with trample and haste in addition to its other types until end of turn
3. Repeat
4. Once you have infinite mana, you may tap and untap any other land(s) you control, and use the mana to activate Agatha of the Vile Cauldron's ability

Results

• Infinite mana lands you control can produce
• Infinite red mana
• Infinite green mana
• Infinite power and toughness for most creatures you control until end of turn