Silvanus's Invoker, and Tolarian Academy

Prerequisites

• Silvanus's Invoker on the battlefield
• Tolarian Academy on the battlefield
• You control at least nine artifacts

Steps

1. Activate Tolarian Academy by tapping it, adding at least nine
2. Activate Silvanus's Invoker by paying , causing Tolarian to become a 8/8 Elemental with haste, and untapping Tolarian Academy
3. Repeat

Results

• Infinite mana lands you control can produce
• Infinite untap of lands you control