Antidote of the Ogre-Rot

This is the antidote of the Ogre-Rot Concoction. It can only be drunken within 6 months of the subject drinking the Ogre-Rot Concoction, or else it doesn't work. The drinker will pass out for 12 hours after drinking this while having the Ogre-Rot effects. They will have no pulse for this whole time, and therefore remain in a half alive half dead state. If drunken in the correct time limit, the subject will gain the following permanent properties:

• Your natural strength score rises to 20, unless it is already higher. This is your permanent strength score, though, so even without any magic items equipped, it is still 20.
• The dust lying in the air floats together to create a Greatclub.
• An adder appears out of nowhere, crawls up your leg, and forms into a Staff of the Adder. It requires no attunement.
• The spell Earth Tremor becomes Cantrip-like, and can be casted at will.

All other effects of the Ogre-Rot melt away, and missing limbs are restored, health is back at full, and all extra body parts die and fall off. If the antidote is drunken by someone without the Ogre-Rot, they must make a DC 15 Constitution saving throw or they die.