I am considering adding a homebrew spell to a game I DM. Here is the exact wording I intend to use:
8th level transmutation
Casting Time: 1 action
Components: V, S, M*
Duration: 8 hours
You touch one creature and one magical item which requires attunement, but to which no creature is currently attuned. At any time within the next eight hours, the affected creature may, as a bonus action, touch the affected item and instantly attune to it without requiring an attunement slot. The creature remains attuned to the item for one minute. After one minute, the spell and the attunement end.
The spell ends early if the creature falls unconscious or if any creature attunes to the magical item. No creature can use this spell to attune to any more than one item at a time.
The creature must still meet any specific requirements this item has for attunement (class, alignment, etc.). If a creature attempts to use this spell to attune to an item whose requirements it does not meet, it suffers the same consequences as it would in the normal attunement process.
* (Any magical item that requires attunement, but to which no creature is currently attuned)
I have tentatively decided this spell should be an 8th-level spell. I feel this strikes a good balance. This spell is a utility spell, and who wants a 9th-level utility spell? But it has the potential to make a character quite powerful for a short period of time, so I don't want a character to be able to cast it more than once a day.
Does this seem like a reasonable spell level? If not, what level should this spell be