Whenever Hammer of Nazahn or another Equipment you control enters, you may attach that Equipment to target creature you control. Equipped creature gets +2/+0 and has indestructible. Equip {4}

Equipped creature gets +2/+2. Whenever a creature dealt damage by equipped creature this turn dies, return that card to the battlefield under your control. Attach this Equipment to that creature. Equip {4}

Flying When this creature enters, sacrifice it unless you return an artifact you control to its owner's hand.

Search your library for an Equipment card, reveal that card, put it into your hand, then shuffle.