Whenever you cast an artifact spell, investigate. (Create a Clue token. It's an artifact with ", Sacrifice this token: Draw a card.") Activated abilities of artifacts you control cost less to activate. This effect can't reduce the mana in that cost to less than one mana.
Forensic Gadgeteer (MKM-057) - Murders at Karlov Manor
less to activate. This effect can't reduce the mana in that cost to less than one mana.
