Stuck at beginning of M.M.R.
Hello everyone. I am right stuck at the mmr. I enter the hole and have cleared the initial west room with the single transporter/2 fountains and the south hallway. I can find no switches to get walls to open up or a key to get into the north-east mirror room itself. Is there gear I need to have? The sewer drain room is another hurdle as I have more been able to reach that pile of dirt. I swear I have tapped, sliced, burned and tried disarm.
Any help would be appreciated. Thank you!