avenger

After going to firedrake and through the underground river you wind up on an island called "the dark isle" where you meet the shop owner who you met in the whale (he always shows up) and you need to get to the top of the observatory tower by a number of ladders, you kill the three robots on each of the telescopes and a chest containing a key drops, get the key then jump back down the tower, theres a nearby cave which glows, inside there are two enemies, kill them and use the key to get through the door into dragonia, it's a very hard level and i'm still stuck on it