Ok, to do this quest you must be a guardian, and accept the fact that you will have to get one of those bad guardian riding armours.
First: Go to guardian tower, and go to right.
Get any riding armour (e.g. Nightmare Riding armour, stuff like that)
Second: Talk to the little boy with green on, about a quest where you can only where riding armour.
Third: Do the quest, and on your first fight, just switch armours to something like blood wizard robes or whatever you want.
Fourth: walk around with your new glitchy game. *Only Temporary*
Funny Thing: Go upstairs to the teleporter room, and you will find that this is a perfect fight for you fighting Twig. =)