Omen Hawker, and Pemmin's Aura

Prerequisites

• Omen Hawker on the battlefield
• Pemmin's Aura on the battlefield
• Pemmin's Aura attached to Omen Hawker
• Omen Hawker does not have summoning sickness

Steps

1. Activate Omen Hawker by tapping it, adding that can only be spent to activate abilities
2. Activate Pemmin's Aura's first ability by paying , untapping Omen Hawker
3. Repeat

Results

• Infinite colorless mana that can only be spent to activate abilities