Koll, the Forgemaster + Mortarpod + Fighter Class + Rograkh, Son of Rohgahh

Koll, the Forgemaster

Mortarpod

Fighter Class

Rograkh, Son of Rohgahh

How it works

1. Activate Rograkh by sacrificing it.
2. Rograkh dies, triggering Koll, returning Rograkh from your graveyard to your hand.
3. Resolve the Rograkh ability, dealing 1 damage to any target.
4. Cast Rograkh by paying 0.
5. Activate Mortarpod's equip ability by paying 0, attaching it to Rograkh.
6. Repeat.

This loop turns a free commander into an endless artillery barrage by exploiting the synergy between a living weapon and cost reduction. With Fighter Class leveled up to reduce equip costs by {2}, Mortarpod can attach itself for free, and Koll, the Forgemaster ensures that whenever Rograkh, Son of Rohgahh is sacrificed while equipped, it bounces right back to your hand instead of staying in the graveyard. Because Rograkh costs zero mana to cast, you can recast it endlessly, re-equip the Mortarpod at no cost, and sacrifice the newly equipped creature repeatedly to ping your opponents to death.