Scrapsmith Goblin

When Scrapsmith Goblin enters the battlefield,
search the Chaos Library for an artifact card card
and put it into the chaotic gaveyard. Then
shuffle the Chaos Library.
Whenever you draw a card, create a 0/1 red
Gnome artifact creature token with battle cry.
{r}, {t}, Sacrifice an artifact: Return target artifact
card from the chaotic graveyard to the battlefield.