Drawing an average four to six cards for five mana is a backbreaker in limited, and having this in the common slot to boot didn't hurt matters much
Most people exclude these from their value lists as they are so well known that they form the core nine of any standard top ten list
SP (Slightly Played) : Minimal signs of use
though you will have Time Lords in the form of Missy, The Master and The Valeyard, at least
Even more, art like Cheung and Ramos and Fishs and Ellis and Yu and Ghos represents that Magic still can be the site of thoughtful artistic experimentation, even when its subject to increasingly difficult creative restraints
You can use it as a sort of protective spell by responding to an opponents removal spell and copying the creature they attempt to kill, or surprise a creature like Niv-Mizzet, Parun in combat to trade