Amoeboid Changeling + Scuttling Sliver + Thran Dynamo + Trazyn the Infinite

UB identity

Commander legal

The 4 combo pieces

• Amoeboid Changeling
• Scuttling Sliver
• Thran Dynamo
• Trazyn the Infinite

How to execute it

1. Activate Amoeboid Changeling by tapping it, causing Trazyn to become a Sliver until end of turn.
2. Activate Trazyn using Thran Dynamo's ability by tapping it, adding {C}{C}{C}.
3. Activate Trazyn by paying {2}, untapping it.
4. Repeat from step 2

What the combo produces

• Infinite colorless mana
• Infinite untap of some creatures you control