Druids' Repository + Kilo, Apogee Mind + Pemmin's Aura

RGWU identity

Commander legal

The 3 combo pieces

• Druids' Repository
• Kilo, Apogee Mind
• Pemmin's Aura

How to execute it

1. Tap Kilo using any free method.
2. Kilo triggers, causing you to proliferate and putting a charge counter on Druids' Repository.
3. Activate Druids' Repository by removing a charge counter from it, adding {U}.
4. Activate Pemmin's Aura by paying {U}, untapping Kilo.
5. Repeat.

What the combo produces

• Infinite proliferate