How do you get up there?

 Spoiler

Well I've jumped to the top before, but I couldn't SS at the right timing. Anyways, I'm wondering if anyone knew how to use the items shown in the other 2 images?

edit: ok I've figured out how to use the marker of heroism now, so I can indeed skip the jump quest part of the mountain now heh, and i also have the special item to skip the forest maze. I'm still puzzled at how to use the keystone though. I almost got the feeling that no maps were implemented to go past this yet...