the Crimson is a living being who wants to balance the world, and the creatures who come from it used to worship the Crimson. It acts like a hive mind connected to all worlds. The being itself is unseen. The crimson appearance isnt like a creature an entity the crimson is an entity who infects grass and trees infected grass turns red and fleshy the infected trees turn into spooky red trees spikes grow if the land is infected with crimson the crimson will slowly take over your world