× You can lure the Wubba in the two tiles corridor to the west and make it follow you; if you cut straight in the corner, the Wubba will be stuck two tiles north of the western Orb.
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× Alternatively, you can let the Wubba follow you all the way to the alcove where it started, and make it stop by going into the alcove. Then rush to the eastern orb, kill the rat, and hit the orb again; the Wubba will follow you, but the alcove will now be open, so you can come back the same way.