Hammer of Nazahn

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}

Commander Masters

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

Double Masters

Commander 2017

Treasure Chest

Because damage remains marked on a creature until the damage is removed as the turn ends, nonlethal damage dealt to the equipped creature may become lethal if you attach Hammer of Nazahn to a different creature during that turn.

If Hammer of Nazahn enters the battlefield at the same time as other Equipment you control, its ability will trigger for each of those Equipment.