Scourge came to the item shop alongside the Plague skin. Both are a part of the Grim Medicine set and resemble plague doctors from the 14th century.
Both are 1,500 V-Bucks($15) in the item shop.
This ominous skin includes a hooded cloak, popular crow-like plague mask, glowing green eyes, and gloves. The character is definitely one of the best to enter the shop lately, perfect for Halloween and the Darkness Rises theme.