Kaedo, Master Crafter

Artifact spells you cast cost {x} less to cast, where
X is the number of cards you've drawn this turn.
This effect can't reduce the cost of those spells to
less than one mana.
{4}{w}{u}, {t}: Search your library for an artifact
card, reveal it, put it into your hand, then
shuffle your library. When that artifact enters
the battlefield this turn, draw a card and put a
+1/+1 counter on Kaedo.