Connect your Steel Foundry :)
WOW ! One more :)
The fourth is Transformation Unit: Steel Foundry.
As previous Transformation Units, the Steel Foundry will add value to the Iron stored will bring you Vitory Point. Not to forget, Steel is useful to protect from Geysers with the Protective Buildings previously unlocked. Are you saying “optimization”?
So What’s next?
*This was a Bearded’s joke!