Like most Magic: The Gathering cards, the value of Teferi, Mage of Zhalfir depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Final Fantasy: Through the Ages)
Their value depends on demand, rarity, and condition compared with English versions
This turns off common red removal like Torch the Tower and Pyroclasm
Youll find booster boxes from current sets, older sealed product, individual packs, and collector tins often at competitive prices because multiple sellers are competing for the same buyers
While this definition is what most Magic: The Gathering (MTG) players will default to when asked what they consider a tutor, Id argue the concept has become a bit broader than that since the 1990s