Try posting your pic again as it didn’t come through.

Preliminarily though it seems to me that these grafted plants while having some eye catching colors are, generally speaking, created and sold by vendors as more of a novelty item. Ive seen other posts here similar to the one above and it seems that these grafted plants just don’t last very long and maybe weren’t really intended to.

I think the nurseries that produce and sell them are probably well aware of this but if they can get people to buy them then maybe they’ve made a bit of profit.

I think they are more of an “entryway” plant in that once someone is given one or interested enough in the “moon cactus” to purchase one, once that fails you just might purchase another type of succulent to give it another try and hopefully have better success, so while this plant may have died, in the long run the vendor has a new customer at least for another plant or two.

Thats just my opinion though. Please try posting your pic again so the forum can see what’s going on with your plant in hopes of salvaging it. Be sure to include the soil & pot.

The grafting used in them...is sub-standard. Like sld said, they dont last long. If you really want the plant, better get it custom grafted on better stock. I think they last the longest on myrtillocactus and thrichocereus.

As for changes, its either sunburnt, or rotting.