Bigger on the Inside, and Pemmin's Aura

Prerequisites

• Bigger on the Inside on the battlefield
• Pemmin's Aura on the battlefield

Steps

1. Activate the creature with Bigger on the Inside and Pemmin's Aura attached by tapping it, adding and causing the next spell you cast this turn to have cascade
2. Activate Pemmin's Aura by paying , untapping the creature
3. Repeat

Results

• Infinite colored mana
• Infinite cascade with mana value equal to the next spell you cast