Powerful creatures have been seen patrolling the hostile region of Southern Mirkwood, including Woe-weaver, a poisonous giant spider.
'More spiders have descended upon Mirkwood. They come from the direction of Dol Guldur. Of all we have encountered, Woe-weaver is the deadliest. Be careful, this giant spider can paralyze even the strongest warrior.'
Woe-weaver can be found somewhere in Southern Mirkwood.
You should defeat Woe-weaver.