Artificery Adorer (5e Feat)

Prerequisites: Intelligence 15 or higher
You have studied the ways of the artificer, and you have managed to learn some of their skills.

When you would attune to an uncommon or rare magic item, you can instead designate that item as secondarily attuned. Only one item can be secondarily attuned at a time. Any attempt to secondarily attune to a second item fails; the creature must end its secondary attunement to an item first. While secondarily attuned to an item that requires attunement, a creature gains only its nonmagical benefits, unless its description states otherwise. As a bonus action, you can instantly attune to a secondarily attuned item. If this would increase the number of magic items you are attuned to above your limit, you can first end attunement with a currently attuned item that is not cursed as part of the same bonus action.
You gain proficiency with tinker's tools and smith's tools.