Runed Stalactite + Scuttling Sliver + The Eternity Elevator + Trazyn the Infinite

UB identity

Commander legal

The 4 combo pieces

• Runed Stalactite
• Scuttling Sliver
• The Eternity Elevator
• Trazyn the Infinite

How to execute it

1. Activate Trazyn using The Eternity Elevator'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 untap of some creatures you control