Shapeshifters are a creature type whose cards frequently copy other permanents or alter their own characteristics. Many also possess changeling, giving them every creature type and making them natural additions to typal decks.
Mirror Entity can turn your entire creature board into every creature type, while changelings naturally slot into almost any typal strategy. Clone, one of Magic’s earliest shape-changing creatures and now a Shapeshifter, set the template for copying the best creature already on the battlefield.
