Hardened Scales + Jetfire, Ingenious Scientist // Jetfire, Air Guardian + Mycosynth Lattice

Mana needed: {3}

GU identity

Commander legal

The 3 combo pieces

• Hardened Scales
• Jetfire, Ingenious Scientist // Jetfire, Air Guardian
• Mycosynth Lattice

How to execute it

1. Activate Jetfire, Air Guardian by paying {3}, converting it and putting four +1/+1 counters on it.
2. Activate Jetfire, Ingenious Scientist by removing all +1/+1 counters from it, adding {4} and converting Jetfire.
3. Repeat.

What the combo produces

• Infinite colored mana that can't be spent to cast nonartifact spells
• Infinite colorless mana that can't be spent to cast nonartifact spells