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But in general, I think a good option is to place Meretta in stealth near the entrance to the left corridor; then she will have enough range to shoot at enemies in Dungeon, and if necessary, she can run through the corridor into the hall in two turns. However, the three (six) different speeds in the spell list confuse me, and I don't know how they work; maybe I need to change weapons or something, so this is also a question for Nebu/Revan.