Steward of the Harvest, Pemmin's Aura, and Tolarian Academy

Prerequisites

• Steward of the Harvest on the battlefield
• Pemmin's Aura on the battlefield
• Tolarian Academy in exile

Steps

1. Activate the creature with Pemmin's Aura attached using Tolarian Academy's ability by tapping it, adding at least
2. Activate Pemmin's Aura by paying , untapping the creature
3. Repeat

Results

• Infinite blue mana