Help with pricing homebrew item

[shroudb]

So I made this ring for my abp campaign, but I don't really know what level I should make it to calculate a price in case my players want to sell it instead (or to have a DC for reverse engineering it).

All opinions welcomed (also you can tell me if you like it or not).

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Ring of stars:
This platinum ring has tiny gemstones set into it depicting 3 different constellations.

As a 3 action activity with the manipulate trait one can point his hand on an enemy and try to trace any of the three constellation in the air.

If successful, tiny motes of starlight descent on that enemy.

The 3 constellations have different difficulty in trying to trace them:

Easy: DC 20 Occult check, has the effect of a 3 action cast of 2nd rank magic missiles.
Medium: DC 30 Occult check, has the effect of a 3 action cast of 3rd rank magic missiles.
Hard: DC 40 Occult check, has the effect of a 3 action cast of 4th rank magic missiles.

The user can instead of Occult use Lore(astrology) with a -2 on the check DC.
The DC increases by 3 if not under the open sky.

After the ring has expanded its power, it automatically recharges after 10 minutes under the open sky or 30 minutes while indoors.

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I was thinking like level 8ish or 9is?but maybe that's too low?

[YuriP]

Interesting item. Instead of done 3 versions of it you made it with different checks instead of different versions.

I suppose that this easy option is 3rd-Level Spell and not 2nd level because magic missiles are Heightened (+2) an so on.

Due this probably it's a lvl 17 item similar to Wand of Manifold Missiles (7th-Level Spell) and probably will cost the same (15,000). Because the main diference between them is that Wand of Manifold Missiles constantly cast missiles during 1 minute but can casted safely only once per day while your item can cast basically once every battle from anyone (not only casters) but needs to do checks what balance it with the wand.

[shroudb]

i copy pasted the wrong text lol (the earlier version) i have that fixed for the players as 1st/3rd/5th rank mm.

so based on those similarities you mentiooned then you 'd say level 13 item. interesting.

ty for the input.