Requires

Mechanized Production must be on the battlefield. Strionic Resonator must be on the battlefield. Krark-Clan Ironworks must be on the battlefield. Mana needed:

Steps

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

Results