Board Thread:Spoilers!/@comment-9241531-20150811165244/@comment-24674051-20150814141055

motive may not have been the right word, i agree. But, time spell aside, there are probably a ton of things a Dark One can do with that wand. Particularly if a the current Dark One receives all the experiences from every previous dark one. (and it seems like a reasonable supposition)

but that is slightly tangent to the topic at hand.