Toph, Greatest Earthbender + Power Depot + Crystalline Crawler + Kami of Whispered Hopes + Thermopod

Toph, Greatest Earthbender

Power Depot

Crystalline Crawler

Kami of Whispered Hopes

Thermopod

How it works

1. Play Power Depot, which will enter with a +1/+1 counter on it due to its modular ability
2. Cast Toph either from your hand or from the command zone by paying 2 plus commander tax if applicable.
3. When Toph enters, it triggers, earthbending Power Depot and putting a number of +1/+1 counters on Power Depot equal to the mana spent to cast Toph, increased by Kami of Whispered Hopes.
4. Activate Thermopod by sacrificing Power Depot.
5. When Power Depot dies, its modular ability and Toph trigger.
6. Resolve the modular trigger, putting the +1/+1 counters that were on Power Depot onto Crystalline Crawler, increased by Kami of Whispered Hopes.
7. Resolve the Toph trigger, returning Power Depot from your graveyard to the battlefield tapped. Power Depot will enter with a +1/+1 counter on it due to its modular ability
8. Activate Thermopod by sacrificing Toph. Choose to return Toph from your graveyard to the command zone.
9. Activate Crystalline Crawler by removing a +1/+1 counter from it, adding R/G.
10. Repeat step 9 until you have enough mana to cast Toph.
11. Repeat from step 2.