Hoss, the Heavy Laden

Anytime an equipped creature you own attacks, look at the top 3 cards in your library. You may cast one equipment from among them without paying its cost. You may attach it to Hoss, the Heavy Laden without paying the equip cost. Put the rest on the bottom in a random order.
Equipment attached to oxen has equip 0.
Heavy Laden- A creature has defender if it has three or more equipment attached to them.