Looking For Homebrew Magic Ring Advice!
I want to make a magic ring that will be pretty powerful but I feel like I need some feedback on the idea. Its a ring for a level 10 party. The effects are:
The Ring of the Fate Master
It is cursed, and cannot be removed without a spell to break the curse.
The weaer can use the ring's power to magic the next attack/save/skill check a Natural 20. Or they can use it to force the next attack/save/skill check to be a Natural 1. Yes, they can cast it on other creatures. Casting it on an unwilling creature requires a wisdom save DC15. Bonus action to activate eitherway.
Each time the wearer uses the ring there is a 10% chance a high CR monster (apprioriate for the party) is summoned. This % goes up by 10% each time too. So if you use it 5 times there is a 50% chance of the summoning.
Then, the creature summoned gains the ring and can use the effects of the ring against the wearer for as many times as the wearer did. Then the ring is destoryed or resets. I haven't decided.
The wearer doesn't know what the negative effects are, only that there is a negative effect of some kind each time they use it.
Obvioulsy this a very strong item in many ways, and I want it to be as its getting late in the campaign. Looking for any feedback on the idea. :) Thanks!