The free Vampire Survivors DLC Ante Chamber brought four weapons, one passive item, and four weapon evolutions never seen before in the game. They're all themed after Balatro, the theme of this free update, and can be unlocked by playing the Ante Chamber Special Stage.
To get and evolve an Ante Chamber DLC weapon, you must unlock it first. For example, it's impossible to evolve Infernolatro in your first run as Jimbo. You need to start by getting this weapon to level six, which will make it available to all characters and let you evolve it into NaneInferno in a future run.
