These would be items you could buy for about 10,000 gold to, when encountering a cheating boss, be able to use to put this cheat into the scroll and be able to use it in battle. And just to make it so nobody complains about people being invincible in pvp, it couldn't be used in pvp. Also, it'd have its limitations to whom you could absorb the cheats of. for example, NO BELLOQ. also, you could only equip a certain amount at a time (depending on your level). These would be able to be bought once you got to level 50 (About the time you get to Celestia). the max amount you could carry would be 100.
I think it would be more reasonable if the price was 100k and you can only own up to 3. Using them only once a battle with probable limitations on what battles. And you can't have access to it until say Azteca or Khrysalis, also you'll have to craft it, which makes it even more difficult.
what about a scroll that you pull up when your in a boss battle and if the boss cheats the scroll would tell you what its cheats are if the boss doesn't have cheats it would say no cheats