The Happiness

The boss will be called The Happiness and will dwell in the Hallow and if you in that area at night it has a 25% chance off spawning.

It will be multi-segmented and the two outer sections will have 10 defense each and the one inner section will have 30 defense and to defeat The Happiness each section will need to be defeated.

It's message when it is about to appear will be "Tonight will have a happy ending." Then it will appear and try to kill you.