Forensic Gadgeteer{2}{U}

Creature — Vedalken Artificer Detective

Whenever you cast an artifact spell, investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.")
Activated abilities of artifacts you control cost {1} less to activate. This effect can't reduce the mana in that cost to less than one mana.

2/3

Illustrated by Vance Kelly