Good card, but how does this relate to time? Shouldn't he give you extra turns, or something...?

It's a beginning of each turn thing, and it's control.

Will edit

i think it is suposed to say ", exile the top fifteen cards of your library: take an extra turn after this one. ~ does not untap at the beginning of that turn's end step."

I think so

I think that's right except cards dont untap during end steps :P

oof i have been defeated

­:)