i was starting yesterday,and i still play until this stage(Runestone Caverns Upper Chambers),i don't know how to open the gate.

one chest i can't take it(near magic booster)

what is the function of switch

and i see the dragon on the opposite place,is it the boss?

please help me><
(PS:i saw the walkthrough but i don't understand=.=|||)

Do open the gate,you have to turn on the grey switch. Its easy to see, its on the lowest part of the upper level near the brine dragon (blue dragon). You cant use that pad near the chest until you activate the switch in the forest area after the Runestone lower chambers. When its active you can go back to that switch and transform into a golem. If you step on the pad as the golem he'll start stomping and crack the ice chunk. Oh and you dont have to fight the dragon, however you can go over there and fight him once you have a transformation that can fly (jump transform might work too but i doubt it). Hope that helps