Lost Jitte + Karn's Bastion + Cryptic Trilobite + Winding Constrictor

Lost Jitte

Karn's Bastion

Cryptic Trilobite

Winding Constrictor

How it works

1. Activate Karn's Bastion by paying 4, putting two charge counters on Lost Jitte and two +1/+1 counters on Cryptic Trilobite.
2. Activate Cryptic Trilobite's first ability twice by removing two +1/+1 counters from it, adding CCCC that can only be spent to activate abilities.
3. Activate Lost Jitte by removing a charge counter from it, untapping Karn's Bastion.
4. Repeat.

This intricate loop leverages Winding Constrictor to supercharge every counter placed by Karn's Bastion and Cryptic Trilobite, turning a simple tap into a compounding engine. As Karn's Bastion proliferates and Cryptic Trilobite builds up a massive reserve of +1/+1 counters, you can cash those counters in for restricted mana to continuously fund your abilities. Lost Jitte ties the entire machine together by letting you spend its boosted charge counters to untap Karn's Bastion, fueling an endless cycle that generates infinite mana, infinite untaps, and infinitely large creatures.