Why would any one pick "Natural Talent" masterie point?

Really, I mean what is it good for? having 10 AD and 15 AP at level 18? the ONLY explanation that i could come up with was it gives some base stats for "Thunderlord's Decree" or "Deathfire Touch " but even for that it doesn't do much. so please give me a reason why i should pick it and who i pick it for.
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