You may activate loyalty abilities of Teferi, Master of Time on any player's turn any time you could cast an instant.
+1: Put a +1/+1 counter on up to one target creature. It gains indestructible until end of turn.
-2: Whenever one or more nontoken creatures attack this turn, create that many 1/1 white Soldier creature tokens that are tapped and attacking.
-6: You get an emblem with "At the beginning of combat on your turn, create a 1/1 white Soldier creature token, then put a +1/+1 counter on each creature you control."