You don't seem to be understanding what
@Lanefan is saying. He is not saying that a PC elf should have Vistani racial abilities. He's saying that if a PC plays a Vistani, they should also have the ability. He is also saying that if a PC takes the Dragonslayer or Witch Hunder class/subclass, the PC can have those abilities, too.
What shouldn't happen, though, is an NPC elven wizard being given the ability to snap his fingers and animate any object as an ability. Not without it also being open to PC wizards or elven wizards as a possibility. If the DM is going to give his NPC elven wizard that ability, the DM should also come up with how the NPC got the ability and balance it with the possibility of the PCs figuring out how to get it, too.
So perhaps the NPC elven wizard summoned a demon who required the sacrifice of 100 virgin cats and a portion of the wizards mind, causing permanent damage. Since he's a wizard, it wouldn't be intelligence, but perhaps the NPC took a permanent -6 to wisdom on top of killing the 100 cats in order to get the ability. A PC may or may not balk at the process if he learns how to do it, and he may fail to learn the process, but there should be a chance of figuring it out and potentially gaining the ability.