Catchweb Spidershrine is a mount for the Greenskins that was introduced in Total War: Warhammer II, in The Total Waaagh! Update as free content.
To get the mount available in your game, you must sign up for Total War Access, sign in, then click on Catchweb Spidershrine to add it to your Steam library. You may also have to sign in to Steam in your browser.
A variant of Arachnarok Spider.
Forest Goblin Shamans can approach the ferocious Arachnarok Spiders without being attacked, and some Great Shamans may ride atop a Catchweb Spidershrine mounted on the back of an Arachnarok Spider.