Clown

The  is a monster which spawns only during a Blood Moon after defeating the Wall of Flesh. The Clown stands on a large orange ball and throws smiley Bombs, which are identical to regular Bombs except in appearance.

Clown bombs can no longer destroy blocks as of 1.2, so they are a great threat to Homes and NPCs. Clowns will only throw bombs when the player is nearby. If left unattended, however, they may even completely destroy the player's home!

Damage can be prevented by killing them quickly, before they have the chance to throw too many bombs. Killing a Clown for the first time will make the Clown Clothes, a set of Vanity Items, available for purchase from the Clothier.

Update Info
v1.2 bombs don't destroy tiles