Agatha's Soul Cauldron + Myojin of Towering Might + Tekuthal, Inquiry Dominus + Crystalline Crawler

Agatha's Soul Cauldron

Myojin of Towering Might

Tekuthal, Inquiry Dominus

Crystalline Crawler

How it works

1. Activate Tekuthal using Myojin of Towering Might's ability by removing an indestructible counter from it, putting six +1/+1 counters on Crystalline Crawler, and two +1/+1 counters on any creature you control.
2. Activate Crystalline Crawler's first ability three times by removing three +1/+1 counters from it, adding 3.
3. Activate Tekuthal by paying 3 and removing three +1/+1 counters from Crystalline Crawler, putting an indestructible counter on it.
4. Repeat.

This loop is a masterclass in counter manipulation, fueled by the engine of Agatha's Soul Cauldron to grant Crystalline Crawler access to Myojin of Towering Might's activated ability. By feeding Myojin into the Cauldron, your creatures can distribute a massive flurry of counters, which Crystalline Crawler readily converts into any color of mana by stripping away its own +1/+1 counters. Meanwhile, Tekuthal, Inquiry Dominus stands by to protect your key pieces by cashing in those same surplus counters to safely bestow indestructible counters, ensuring your loop can keep generating infinite mana and arbitrarily large creatures without interruption.