Whenever you cast an artifact spell, investigate (To investigate, create a colorless Clue token. It's an artifact with ", Sacrifice this artifact: 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.
The information presented on this site about Magic: The Gathering, both literal and graphical, is copyrighted by Wizards of the Coast.
This website is not produced, endorsed, supported, or affiliated with Wizards of the Coast.