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

WUBRG identity

Commander legal

The 4 combo pieces

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

What must be in place

Rukarumel on the battlefield with "Sliver" chosen.

How to execute it

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

What the combo produces

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