Hammer of Nazahn [Commander 2017] Giant Warrior you may attach Hero's Blade

you may attach Hero's Blade to it

If you have the city's blessing

Set: Limited Edition Alpha Type: Creature — Ogre Rarity: Common Cost: {2}{R} The Ogre philosopher Gnerdel believed the purpose of life was to live as high on the food chain as possible

and/or player the spell could target

Set: Amonkhet Invocations Type: Enchantment Rarity: Mythic Cost: {2}{R} Nonbasic lands are Mountains

Hammer of Nazahn [Commander 2017] Giant Warrior you may attach Hero's BladeSet: Commander 2017 Type: Legendary Artifact Equipment Rarity: Rare Cost: {4} 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}