Kosako, a Raider's Best Friend

When Dogmeat, Ever Loyal enters the battlefield,
mill five cards, then return an Aura
or Equipment card from your graveyard to
your hand.
Whenever a creature you control that's enchanted
or equipped attacks, create a Junk token.
—
"It doesn't hurt to have a best friend as loyal
as Kosako, even if you are a son of a gun killing
and stealing all over the Wasteland"