Gxathiz, Arms Collector

Whenever Gxathiz, Arms Collector enters the battlefield or attacks, exile cards from the top of
your library until you exile an equipment card.
Put that card onto the battlefield attached to
Gxathiz, and the rest on the bottom of your
library in a random order.
When Gxathiz, Arms Collector leaves the battlefield shuffle all equipment attached to it
into their owners libraries.