Additional info from a commenter that I can back up:
Art the Clown’s Power uses his bag of toys which includes a handgun, acid, flail horn, and more. They’re one use and apply a “Terrified” status effect which makes your items more deadly as you apply the effect more and more.
His cosmetics consist of santa outfit, apron, and various skins with glasses.
The Terrifier - Perks + Icons
Kill Spree allows you to mori Survivors at will after 8 hook states and all Generators done. It also blocks one exit gate area after a mori for 30s
Laughingstock makes Survivors Exhaused and Oblivious within 12m of a completed Generator. U also see completed gen auras
Funny Business is like Killer version of Dramaturgy but u kick gen and get Haste + one of four possible effects