Tezzeret the Seeker, The Peregrine Dynamo, and Five Hundred Year Diary

Prerequisites

• Tezzeret the Seeker on the battlefield
• The Peregrine Dynamo on the battlefield
• Five Hundred Year Diary on the battlefield

Steps

1. Activate Tezzeret's first loyalty ability by putting a loyalty counter on it, targeting Five Hundred Year Diary and The Peregrine Dynamo
2. Holding priority, activate Five Hundred Year Diary by tapping it, adding at least Activate The Peregrine Dynamo by paying and tapping it, copying Tezzeret's ability, targeting Five Hundred Year Diary and The Peregrine Dynamo
3. Resolve the copy of Tezzeret's ability, untapping Five Hundred Year Diary and The Peregrine Dynamo
4. Repeat from step 2

Results

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