Probably at least some bluff. V should be around 13th level (she/it used prismatic spray, which is a 7th level spell). That means V has somewhere around 26 base spells, plus maybe another 4 or 5 bonus spells. V also gained a ring of wizardry along the way, which doubles one spell levels worth of spells (so call that another 4). Still, barring having multiple rings of wizardry or some other means of enhancing her spell totals, she shouldn't be much above maybe mid 30s in terms of total spells per day. Given how many she had cast up to that point, she maybe had a handful left. How many of those were combat useful? Who knows?
V may also either be higher level than some have suggested *or* she/he/it has some other magic item/ability that grants additional higher level spells. For example, in just the fight against Tarquin and his buddies, V has used 3 7th level spells (that I'm sure of): Prismatic Spray, Force Cage, and Grasping Hand. Unless V has a ridiculously high int score (which I'm assuming is not the case), this would normally require being 16th level. So something is granting V additional high level spells.
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