Its a limit break to Magics design spacean explosive blend of nostalgia, mechanics, and power that reshapes Commander and beyond
When you venture into the dungeon for the first time in a game, you choose one of the three dungeons and move into the first (top) room, triggering its ability
Brawl Legal Vintage Legal Timeless Legal Commander Legal Pauper Not Legal Oathbreaker Legal Penny Not Legal Avishkar Raceway Land Start your engines
You get an emblem with "Creatures you control of the chosen type get +3/+3 and have vigilance and hexproof." Each face of a transforming double-faced card has its own set of characteristics: name, types, subtypes, abilities, and so on
Technically you can have as many as you want (assuming you can shuffle it in your hands), but thats a talk for another time