A blessing of the god of rot and disease, 7 'growths' encapsulate the blessings. when you go up a tier, unless granted by a wish spell, you cannot go down tiers. 

Growth 1: Undetectable unless shown, a small emblem of the rot goddess appears on your flesh and will begin to pustulate.

Growth 2: Visibly detectable, your skin becomes flakey, bloated and falls off at a touch, lower your base AC by 1. 

Growth 3: The last growth you can obtain before becoming vilified by the church, and unable to gain the benefit of holy weapons. Lower your base AC by 2

Growth 4: You have becoming a devout follower of Cyttia, she blesses you with an ability. Take an action to throw Bloated Miasma at an enemy up to 20 feet away, dealing 2 d8 acid damage. Lower your AC by 4

Growth 5: The rot is consuming you, but you welcome it fully. You become unable to lift holy weapons, as their weight is infinite. The boils of your flesh shield you from damage, attacks that slash or pierce deal half damage to you.

Growth 6: Cyttia grants you one of her skeletons to be your defender, while active it lowers your AC down to 5 while its AC is 22. it will get in front of you if damage comes your way, and if it is too far from you to deflect the damage, it will roll a d20, on an unmodified roll of 11 up it will teleport to your location to take the damage. on a 10 to 1 it will not teleport. You can no longer have a good ending as long as this growth is present.

Growth 7: You are a child of Cyttia, your body is not yours, your purpose to do her will. Your body is repulsive to look at, but you become a harbinger of plague and death, a thick miasma surrounds you and makes you harder for enemies to hit, you cannot speak as your body mutates. You can only obtain this growth after defeating the Author.