Magic: The Gathering can be a very toxic community, but Autograph Book could be a wholesome way to make some new friends or talk to new people in your local game store, while also powering up this card for future games
It's not quite on the level of Teferi's Protection, but saving yourself from an opponent swinging out can turn the game in your favour no matter what
An Aura returning to the battlefield this way doesn't target the player or permanent it will enchant, so permanents or players with hexproof may be chosen
You can pay one mana to get a basic land and four mana to get any card
There are plenty of places to trade cards in person, like at Pokmon or trading card conventions, at game or trading card stores, or at your local Pokmon League
The gimmick around Nazahn and Hammer of Nazahn is also very compelling, making the template for an equipment minded deck that will often circumvent equip costs