<p><span style="font-size:14px"><strong>Forbidden Knowledge achievement</strong> you can obtain by using a Key to Knowledge </span><img src="https://vignette.wikia.nocookie.net/tibia/images/9/9b/Key_to_Knowledge.gif/revision/latest?cb=20161103193758&path-prefix=en" alt="image"><span alt="image" src="https://vignette.wikia.nocookie.net/tibia/images/9/9b/Key_to_Knowledge.gif/revision/latest?cb=20161103193758&path-prefix=en"><span style="font-size:14px"> on a Forbidden Tome </span><img src="https://vignette.wikia.nocookie.net/tibia/images/1/12/Forbidden_Tome.gif/revision/latest?cb=20161103193936&path-prefix=en" alt="image"><span alt="image" src="https://vignette.wikia.nocookie.net/tibia/images/1/12/Forbidden_Tome.gif/revision/latest?cb=20161103193936&path-prefix=en"><span style="font-size:14px">. This won't work if you have never eaten a Forbidden Fruit </span><img src="https://vignette.wikia.nocookie.net/tibia/images/c/ca/Forbidden_Fruit.gif/revision/latest?cb=20161103194714&path-prefix=en" alt="Forbidden Fruit"><span Fruit" src="https://vignette.wikia.nocookie.net/tibia/images/c/ca/Forbidden_Fruit.gif/revision/latest?cb=20161103194714&path-prefix=en"><span style="font-size:14px">. After you use Key to Knowledge on </span><span style="color:#34495e; font-family:"Open Sans",Helvetica,Arial,FreeSans,sans-serif; font-size:14px">Forbidden Tome both Tome, <u>both items will disappear.</span></p>disappear</u> and you will see text: </span><em><span style="color:#34495e; font-family:Open Sans,Helvetica,Arial,FreeSans,sans-serif"><span style="font-size:14px">You gained a tremendous amount of knowledge</span></span></em></p>