Agatha of the Vile Cauldron, Silvanus's Invoker, and Shimmerwilds Growth

Prerequisites

• Agatha of the Vile Cauldron on the battlefield
• Silvanus's Invoker on the battlefield
• Shimmerwilds Growth on the battlefield

Steps

1. Activate the land with Shimmerwilds Growth attached by tapping it, adding
2. Shimmerwilds Growth triggers, adding
3. 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
4. Repeat

Results

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