Urza, Prince of Kroog + Grim Monolith + Mondrak, Glory Dominus + Akroma's Memorial

Urza, Prince of Kroog

Grim Monolith

Mondrak, Glory Dominus

Akroma's Memorial

How it works

1. Activate Grim Monolith's first ability by tapping it, adding CCC.
2. Activate Urza by paying 6, creating two token copies of Grim Monolith that are 1/1 Soldiers in addition to their other types.
3. Activate both Grim Monolith tokens' first abilities by tapping them, adding six C.
4. Repeat from step 2.

This explosive loop hinges on Urza, Prince of Kroog turning Grim Monolith into a token-copy machine that outpaces its own mana cost. While tapping Grim Monolith normally yields just three colorless mana, Mondrak, Glory Dominus doubles the token output, allowing Urza's six-mana activation to produce two copies of Grim Monolith instead of one—leaving you with a net surplus of mana each iteration. Meanwhile, Akroma's Memorial turns your newly minted artifact creature tokens into an unstoppable, keyword-laden army with flying, trample, haste, and protection across the board.