Within a custom game, I tried to buy ZZ'Rot, but this item is still disabled despite the fast that the client notification about ZZ'Rot item being disabled because of a gamebreaking bug was gone quite a few maintenance ago.
1. Create any kind of game mode that allows buying ZZ'Rot (It either works on Practise Tool, Custom games or Normal games)
2. Within the game, look for the item "ZZ'Rot Portal"
3. There should be a red text saying "Item Disabled", making it impossible to buy it
Here's the image with the item disabled
Video here as well: