If they are, modify the teleport to jump to 100N100E, based on the assumption that Rufus was familiar with the arena and an observer of where the clouds went while watching the previous combats.The two clouds are 20' radius each, 20' high, one centered at 35N40E, and the other centered at 110N75E (it abuts the north wall).

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.