Deserted Temple + Rings of Brighthearth + Tolarian Academy

U identity

The 3 combo pieces

• Deserted Temple
• Rings of Brighthearth
• Tolarian Academy

What must be in place

You control at least four artifacts.

How to execute it

1. Activate Tolarian Academy by tapping it, adding at least {U}{U}{U}{U}.
2. Activate Deserted Temple's second ability by paying {1} and tapping it, targeting Tolarian Academy.
3. Rings of Brighthearth triggers, causing you to pay {2} to copy Deserted Temple's ability, targeting Deserted Temple.
4. Resolve both Deserted Temple abilities, untapping Deserted Temple and Tolarian Academy
5. Repeat

What the combo produces

• Infinite blue mana
• Infinite mana lands you control can produce
• Infinite untap of lands you control