How rare is this artificer magic item I created? [closed]

Question

One of my backup characters is a level 10 gnome artificer and has some self made magic items, but I roleplay it as if it's a technological swiss army knife with different functions with 3 buttons. (using an item interaction to switch modes)

By default the item is her tinkers tools (artisan tools).
The 1st button turns the item into a stim-pistol, giving her the ability to use the healers kit from 30 ft. away.
The 2nd button turns it into a tiny taser-pistol infused with repeating shot which uses intelligence for to hit with a 1d4+int dmg modifier, with as a special effect: (recharge 5-6) When you hit a creature with your taser pistol, it must succeed on a constitution saving throw of 18 (8+int+PB+1) or be paralyzed until the end of their next turn.
The 3rd button turns it back into her default item

I was wondering how rare the stim-pistol and the taser-pistol would be individually (ignoring the fact that the DM allowed me to infuse the taser for the rule of cool).

Answer 1

Stim-pistol: Uncommon

Taser-pistol: Very Rare

You could think of the stim-pistol as having an effect which is slightly more powerful than the cantrip Spare the Dying, (because it doesn't require touch), but less powerful than the 1st level spell Healing Word, (because it has less range, doesn't regain hit points and requires an action rather than a bonus action). Magic items which cast 1st level spells are usually uncommon. For example Wand of Magic Missile, Wand of Magic Detection, or the Wand of Entangle.

The taser-pistol is arguably a better version of the rare item Wand of Paralysis, because it recharges faster, has a higher DC for saving throws, and also does damage. While it is not better in all circumstances - since it does require you to hit, and the paralysis only lasts until the end of their next turn; the fact that you can expect to be able to use this once or twice per combat would seem to warrant pushing it up to the very rare category.

Answer 2

The Paralysis effect is way too good.

The "taser pistol" is functionally a one-round hold monster spell that you can use at least once in every fight. Even with the limited effect, Paralyzed is possibly the most devastating condition in the game on the PC side because of the "free crits!" sign it sticks on the target's head.

I'm not sure I can come up with a rarity for that; even if it were 'recharge on a short or long rest', it's probably Legendary, but it's hard to judge because of the lack of comparables.

At the very minimum I'd change that effect to Stunned, which is functionally identical except doesn't have the crit effect, and I'd probably recommend changing it to Restrained, or maybe even all the way down to the shocking grasp effect of just removing their reaction.