Teferi, Master of Time (293) (Showcase, Foil)

'You may activate loyalty abilities of Teferi on any player's turn any time you could cast an instant.
[+1]: Draw a card, then discard a card.
[−3]: Target creature you don't control phases out. (Treat it and anything attached to it as though they don't exist until its controller's next turn.)
[−10]: Take two extra turns after this one.