Lost Jitte + Karn's Bastion + Cryptic Trilobite + Hardened Scales

Lost Jitte

Karn's Bastion

Cryptic Trilobite

Hardened Scales

How it works

1. Activate Karn's Bastion by paying 4, putting a charge counter 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 fascinating loop turns Karn's Bastion into an engine for endless growth by utilizing the way mana generation and counter manipulation feed back into one another. Cryptic Trilobite acts as your specialized battery, providing the exact funds needed to fuel abilities through its ability-locked mana, which is supercharged by Hardened Scales ensuring extra growth whenever counters land on creatures. Meanwhile, Lost Jitte passively tracks the action while offering a vital utility valve that untaps your lands, allowing Karn's Bastion to proliferate the board indefinitely.