Daedalus, Master Crafter

Heroes and Demigods you control have "{t}: Add {u} or {r}. Use this mana only to cast Artifact and Instant spells."
Valiant - Whenever you cast a spell that targets Daedalus, Master Crafter, you may search your library for an Artifact with mana value 4 or less,
reveal it, and put it into your hand. If you do,
shuffle.