Steelswarm Operator, Pemmin's Aura, and Encroaching Mycosynth

Prerequisites

• Steelswarm Operator on the battlefield
• Pemmin's Aura on the battlefield
• Encroaching Mycosynth on the battlefield

Steps

1. Activate Steelswarm Operator's second ability by tapping it, adding that can only be spent to activate abilities of artifacts
2. Activate Pemmin's Aura by paying , untapping Steelswarm Operator
3. Repeat

Results

• Infinite blue mana that can only be spent to activate abilities of artifacts
• Infinite blue mana that can only be spent to cast artifact spells