learn cards mtg Retriever Phoenix - Strixhaven: School of Mages Aang, A Lot to Learn

Named after the original threshold mechanicyou guessed it, threshold from Odyssey (design by Richard Garfield)a threshold mechanic is a mechanic with the following two traits: Cards with this mechanic have two states

First they count as duals so you can fetch them out with things like Three Visits and fetchlands like Polluted Delta

That creature doesnt untap during its controllers next untap step

Gaining control of an opponents card (stealing!) Removing cards from the game entirely not just putting them into the graveyard

For obvious purposes, I wont show any examples, but if youre curious as to which Magic cards are banned for this reason, the official Magic site has a list here for you to check