Originally Posted by Gnoman
V has used Dimensional Anchor on multiple occasions. The only reason that Durkon didn't have it prepared is because V does, so they "optimized" by comparing spell slots and avoiding duplication, thus ensuring that they had a wider range of spells available.
Really, with the amount of times V's gone AWOL, one would think that either Durkon or Elan or Roy would have begun to plan around her absence. I won't be disappointed, exactly, if they don't learn from this experience, but I won't be surprised either.