Teferi's abilities are all relevant in a game of Commander, from preventing opponents from messing with your turns to giving you more flexibility during theirs
his other works, like the aforementioned Samurai Champloo and the exceptionally slept on Space Dandy are similar, due to his tendency to focus on self-contained episodes connected to a faint overarching plot that made it easy to miss an episode in rotation and not feel totally lost (but then want to ensure you saw it on a rerun)
It doesnt hurt that the card has some potential in the competitive scene, either
Four mana isnt a ton and makes this more efficient than most of the other tutors unless youre specifically looking for a 1- or 2-mana spell, and even then, its on par with Chord and Finale
Savior of Ollenbock Eliminate the problems Savior of Ollenbock is a three-mana White 1/2 with training
BGS uses sub-grades (centring, corners, edges, surface), giving detailed condition breakdowns, and their Black Label 10 is rarer than PSA 10