Umbral Mantle + Vhal, Candlekeep Researcher

U identity

Commander legal

The 2 combo pieces

• Umbral Mantle
• Vhal, Candlekeep Researcher

How to execute it

1. Activate Vhal by tapping it, adding at least {C}{C}{C} that cannot be spent to cast spells from your hand.
2. Activate Vhal by paying {3} and untapping it, giving itself +2/+2 until end of turn.
3. Repeat.

What the combo produces

• Infinite colorless mana that can't be spent to cast spells from your hand
• Infinitely large creature until end of turn