Notable designers such as Mark Rosewater have publicly stated multiple times that Mays event set will mark several big changes in the TCGs narrative and mechanical structure
The main items are detailed down below, quoted from WotCs official article: Creatures without creature types got some creature types. Some artifact creature cards just said summon artifact and some legendary creature cards said summon legend. For example, the first printing of Rorix Bladewing was a Creature Dragon Legend, but this was changed to Legendary Creature Dragon. Creatures that lacked races got a race. Samite Healer was a cleric but is now a human cleric
A highly rendered digital artwork from 2019 is sent hurdling back twenty years in the past simply by changing its border
8 Group Hug An archetype that focuses on providing beneficial effects to everyone in a given game, Group Hug is an ever-popular, if rarely competitive, choice of deck
And Rin and Seri can tap to deal damage equal to the number of Cats and Dogs you control which adds up fast
Disney Lorcana The game can be played anywhere
