When you determine your ability scores, increase 2 of those scores by 2, and another score by 1. These increases cannot raise a score past 20. This trait will be in effect whether the method of scoring is rolling or point buy.

Curses are generally resistant to Cursed Spirit Manipulation unless they're defeated or caught off guard. Once absorbed by Cursed Spirit Manipulation, the curse is forced into compliance with it's master. The curse can be destroyed by it's master and all canon implications stick. Roll a 1D20 if an attempt to manipulate is performed. Resist if the roll is 16+.

Since Curses are made of Negative Cursed Energy, The Positive Cursed Energy exhibited by things like the Blade of Extermination, Round Deer, Reverse Cursed Technique, and Cursed Technique Reversal would be massively detrimental to their livelihoods and would make quick work of spirits.

As a curse, normal humans cannot see nor interact with you. But you can see and interact with humans, even killing them if you please. They cannot stop you.

If a curse comes across a finger of the imaginary god, Ryomen Sukuna, they can absorb it and gain a massive power boost. When a finger is absorbed, add 3 to every physical stat (Strength, Dexterity, Constitution). Add 2 to every saving throw.