Unseat Hand

You sever a hand from your body and grant it sentience. Your hand becomes a crawling claw with the creature's game stats, except it gains proficiency in Sleight of Hand and Stealth checks, and has advantage on those checks.

On each of your turns, you can use a bonus action to mentally command the crawling claw while it's within 1 mile of you. You decide what action the crawling claw takes and where it moves during its next turn, or you can issue a general command. If you issue no commands, the crawling claw defends itself against hostile creatures. Once given an order, the crawling claw continues to follow it until its task is complete.

You can use a bonus action to reattach the crawling claw to your body, returning your hand to normal. The crawling claw's under your control for a day, after which you must reattach it to your body or it dies. If the crawling claw dies by any means, it can't be reattached to your body unless by magical means, as through a regenerate spell.

At Higher Level. When you cast this spell using a slot of 4th or higher, the crawling claw's under your control for 10 days. If you use a slot of 6th or higher, the duration increases for 90 days. If you use a slot of 8th or higher, the duration is 366 days.