The Brain of Cthulhu is the Crimson counterpart to the Eater of Worlds, but it can be a bit more difficult to defeat. This holds true especially if you are playing in Expert mode, as the Brain can inflict random debuffs on

Journey Mode is mostly for players who want a more tailored experience, or those that want to play through the game more quickly. Players who mess around with the research and duplication mechanics will quickly find that it breaks progression in Terraria DLC considerably. This is a lot of fun since the player can accomplish things that would normally take days in a matter of a couple of hours. The issue here is that players who have less experience with the game can find themselves accelerating quickly without learning how the game is played.