Abby, Merciless Soldier + Mana Echoes + Phyrexian Altar + Goblin Bombardment

Abby, Merciless Soldier

Mana Echoes

Phyrexian Altar

Goblin Bombardment

How it works

1. Cast Abby from the command zone by paying 1 plus commander tax.
2. Abby triggers, creating a number of 1/1 Cordyceps Infected creature tokens.
3. When the Cordyceps Infected tokens enter, Mana Echoes triggers that many times, adding C for each Fungus and/or Zombie you control for each trigger.
4. Resolve Abby, giving control of it to an opponent.
5. Activate Goblin Bombardment four times by sacrificing four Cordyceps Infected tokens, dealing 4 damage to Abby.
6. Abby dies as a state-based action due to having 0 toughness. Choose to return it to the command zone from your graveyard.
7. Activate Phyrexian Altar twice by sacrificing two Cordyceps Infected tokens, adding .
8. Repeat.

This explosive loop is centered around casting Abby, Merciless Soldier from the command zone, transforming the investment of mana into an immediate swarm of 1/1 Cordyceps Infected tokens thanks to Abby's cast trigger. As those tokens flood the battlefield, Mana Echoes goes to work, leveraging the shared Fungus and Zombie creature types to generate an overwhelming amount of colorless mana with every entry. Meanwhile, Phyrexian Altar provides the crucial colored mana by converting extra tokens into the specific fuel needed to recast your commander, and Goblin Bombardment provides the precise lethal damage required to send Abby back to the command zone so the entire cycle can begin anew.