Lost Jitte + Karn's Bastion + Cryptic Trilobite + Vorinclex, Monstrous Raider

Lost Jitte

Karn's Bastion

Cryptic Trilobite

Vorinclex, Monstrous Raider

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 centers around the doubling power of Vorinclex, Monstrous Raider, which turns every single counter-placement effect into an exponential engine. When you activate Karn's Bastion to proliferate, Vorinclex doubles the resulting counters—stuffing extra charge counters onto Lost Jitte and extra +1/+1 counters onto Cryptic Trilobite. You can then strip those +1/+1 counters away using Cryptic Trilobite to generate the exact restricted mana needed to untap Karn's Bastion via Lost Jitte's triggered ability.