The rarity of Shivshell Crawler is Rare, and been equipped it takes a “Bundle” slot. At this moment the item is available for trade.
Shivshell Crawler is a skin for Slark. The skin was added to the game on July 9, 2015, it was created by Zipfinator.
Shivshell Crawler has been recently added to the game, which makes it rather popular with the game community.