Concealed Factory

{t}: Add {u} or {c} to your mana pool.
Each artifact card you own with converted mana cost three or less that isn't on the battlefield has madness {3}.
Delirium - As long as there are four or more card types among cards in your graveyard, Concealed Factory has "The madness cost of each artifact
you own that isn't on the battlefield cost {2} less
to cast."