just go inside a cave where there is a flying scorpion and burn off the brambbles using sk if u dont have fire 3. then pull the lever. it so much cheaper than doing other way.The problem with using the rune on the tower is then it's locked out for opening Richard's domain, which is happening at a pretty similar time. Solvable with a Power Core, but 3x Blessed Water is more cost effective, and you get the full HP/MP restore from the SK, too. Not to mention, I want to back attack the Thunder Golem anyway.