Emia, Blazing Soul Smith

Flash, double strike, menace
If a permanent is dealt 3 or more damage by
an artificer or artifact source you control,
exile that permanent.
Whenever at least one artificer and one artifact creature you control attacks or blocks, you may
exile the top three cards of your library. Then,
you may put those cards onto the battlefield
facedown as 5/5 black Golem artifact creatures.
If you don't, put them into your hand.