Requires

Mechanized Production must be on the battlefield. Lithoform Engine must be on the battlefield. Krark-Clan Ironworks must be on the battlefield. Mirror Box must be on the battlefield. Mechanized Production attached to Lithoform Engine. Mana needed:

Steps

1. At the beginning of your upkeep, Mechanized Production triggers.
2. Holding priority, activate Lithoform Engine's first ability by paying and tapping it, copying the Mechanized Production trigger.
3. Resolve the copy of Mechanized Production's ability, creating a token copy of Lithoform Engine.
4. Activate the Lithoform Engine token's first ability by paying and tapping it, copying the Mechanized Production trigger.
5. Activate Krark-Clan Ironworks by sacrificing the Lithoform Engine token, adding .
6. Repeat from step 3.

Results