you may activate loyalty abilities of teferi, master of time 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.
Teferi, Master of Time from Promo Pack: Core Set 2021