I found this key in the netherealm. It says :
"Key found on a dead body in the Nether Realm" . The kicker is I cant seem to use it. I go to the krypt and push the R1 button to use the keys to buy a coffin but i cant use it and its the only key in my invintory in Konquest mode. If anyone has found this key or found and now how to use it plz post your replies here .