Rakir
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Hello,
I only have the red key master's tent, but I don't have the red tower:
What should I do?
You have the red tower.
There is a teleport near the red tent. Exit it and go to the left (past the temple with a second-level spell), then past the fountain of luck, and to the left of it, into the corridor. That's where the red gates are.
If they're not there, then I'm confused too.