To The Crows

You caw like a crow, and the distant ruffle of leaves and branches echoes around you. For every hour of rest you received in the previous day, you have 1 magic crow that you may summon to your aid with this spell. The number of crows you summon is up to you, but you may have no more than 12 crows active at one time and no more than 12 crows in your reserves (meaning that, at 2nd level, sleeping for more than 12 hours in one day then casting thrice will leave no crows in reserve but at 3rd level you can have 2 in reserve), and no more than 4 crows every time you cast this spell. This crow will follow your command until the spell is dispelled, e.g. via dispel magic, the crow is destroyed, you are knocked unconscious, must make a death saving throw, an action states the crow is dispelled in the process, or there is more than 120ft of distance between you and the crow. While the spell is active, the crow may be used to perform any actions you might expect out of combat.

Scout: You may send a crow no more than 120ft to a location you are aware of. After 8d8 minutes, the crow will return, then be dispelled. What happens next is up to the DM; the DM can either present a concise, detailed summary of the area (e.g. rough number of enemies, type of enemies, terrain, friendliness, possible value to the party, blacksmiths, stores, taverns, etc.) or the party can receive a +1 to all of their ability scores and Advantage on one saving throw of their choice while they are within a 240ft radius of the area the crow was sent to (roughly). 

Thief: You may send a crow no more than 120ft to retrieve an object whose location you are aware of. The object must be shiny, must not have a weight exceeding 10lbs. and must not have a value of more than 10gp. If the object fits these criteria, the user must then make a Stealth check (add their own modifier) with a DC equivalent to the the weight of the object + its value. After 8d8 minutes, the crow will return with the object, then be dispelled. If the Stealth check was failed, the item will not be returned.

Attack: You may send your crow into battle in a manner similar to using magic missile. A ranged spell attack is not required Each crow has 4 + your spellcasting modifier hit points and every time you receive damage, one crow will be dispelled (the crows can also be targeted by creatures if you are in that attack's range). When you attack with a crow, they will deal 1d4 Poison damage and be immediately dispelled. (A failed attack does not dispel them.) If a creature has been attacked by a crow before, they must make a CON saving throw every turn with a DC equivalent to the crow's attack or be Poisoned (stops on successful saving throw).

Other: The crow may perform other actions (WITHIN REASON) that are up to the DM. For example, a DM may give permission for a crow to commit an act of vandalism e.g. destroy a painting with its talons, but if the DM is letting the crow do something like defeat a tarrasque with no help, it might be time to pack it up and lock the DM in a padded room. 

At higher spell slot levels: For every additional level of spell slot this spell is cast from, you may summon two extra crows every time you cast this spell as well as summon two extra crows every day. At 5th level, the damage of each crow increases by another 1d4 Poison damage, and you must only rest for 1/2 an hour to gain an extra crow.

 ADDITIONAL NOTES: I'm relatively new to DnD - in fact I'm FINALLY DMing my first campaign right now - so I don't expect this spell to be balanced in the slightest. I've tried my best, but if there's anything you think I should change, I'd be happy to do it. I plan on updating this spell as I learn more but I'd appreciate if any of you kind folks would put in comments with advice.