Vivid

Vivid is a first boss that played need to kill.

Spawning
Vivid can be spawned by destroing Vivid's Statue in Vivid Dungeon by Cobalt or Reinforced Cobalt Pickaxe. Vivid Dungeon spawns in any biome in Overworld where there are grass blocks.

Lore
Every god of the Ark Pantheon swore an oath not to harm people. But when an unknown man killed Vivid's daughter,  he went mad. He began to kill innocent people. For which the other gods imprisoned him in this  fortress maze and put on a mask that turns him into a statue. The only thing vulnerable to the mask is cobalt.