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Red? Who is red? The player? Then it's the end of the game, and you can change the mentor's build as much as you want to the left of the outpost. If red refers to the bishop in the Dungeon, then he's certainly a cunning fellow. In general, for the Dungeon, I recommend using Chaos. The Meteorite (which can be obtained in the temple on the shore of the underground lake, before the boss) is very effective against the bishop, and the Wall of Fire is extremely effective in the final battle before meeting Jorgen.