Jagged Ice Key
https://everquest.allakhazam.com/db/item.html?item=63077
is what you need and it drops from Haze
http://eqbeastiary.allakhazam.com/search.shtml?id=23976
Spawns after you turn Jagged Ice Key into the gnome version of Grenrik the Addled.
Then turns into a giant and if you FD or LOSE agro he turns into you and then become non kill able so you have to fight right away. After non kill able you have to have another key to get back the giant version. If you spawn the giant version you cannot go into med mode either because he will agro