Scuttling Sliver, Trazyn the Infinite, Grim Monolith, and Rukarumel, Biologist

Prerequisites

• Scuttling Sliver on the battlefield
• Trazyn the Infinite on the battlefield
• Grim Monolith in the graveyard
• Rukarumel, Biologist on the battlefield

Steps

1. Activate Trazyn using Grim Monolith's ability by tapping it, adding
2. Activate Trazyn by paying , untapping it
3. Repeat

Results

• Infinite colorless mana
• Infinite untap of creatures you control
• Infinite mana creatures you control can produce