Teferi, Temporal Archmage can be used in a game of Magic: The Gathering by following these rules:
- Teferi's abilities can only be activated at sorcery speed, meaning during your main phase when the stack is empty.
- Teferi's 1 ability allows you to untap up to four target permanents.
- Teferi's -1 ability lets you search your library for a card and put it into your hand.
- Teferi's -10 ultimate ability allows you to take two extra turns after this one.
