Slay 50 Skeletons
This is where the necromancer Sargoth's forces are massing and this is my second chance to stand up to him. I have tried to destroy the bridge but they repair any damage faster than I can damage it. There's nothing to be done but to defeat his forces here. The skeletons are his weakest minions, start there.
Destroy Guard Gargoyles
Sargoth has brought in some of the gargoyles from the Bonecliffs to serve as guard dogs of the tower. There aren't many so destroying most of them will leave gaps in his defenses.
Get Weapons from Big Bones
The Big Bones are the strength of Sargoth's army. They have a nasty habit of picking up their fallen comrades' maces and that makes them doubly dangerous. Go destroy Big Bones and make sure that you take their maces whenever you find them.
Find the Skeleton Courier
I'm afraid it won't be as simple as decimating his forces. I know that one of these skeletons is a courier sending a message to the rest of his forces throughout Doomwood. Try to intercept the courier and bring me his message.
The message reads "I have hidden plague bombs on twelve of my skeletal warriors. They will carry their gifts to every corner of these woods and detonate themselves, spreading the undead plague to all those who would stand against me. Make sure they are not interfered with. -Sargoth"
Find the Plague Bombs on Skeletons
If those skeletons get past here, there will be no way to track them all. Those plague bombs cannot get past the bridge. You must search the skeletons until you have found and destroyed all of the bombs!
Defeat Big Bones
I see. Several of the bones used to construct the large ones were culled from LIVING plague victims. They still have the power to spread the plague. You must destroy these bones. I am not as powerful as I was when I was alive but I can use my power to protect you from the disease while you destroy them. Hurry!
Get the Tower Key from Gathmor
You have done alot a lot of damage to sargoth's army Sargoth's Army and I have kept them from passing my post, but to enter the tower you will need to defeat the trolluk deathknight that Sargoth has placed in command, General Gathmor. He holds the only key to the Shatterskull Tower.
You got the key. Well done. I have one last favor to ask you. If you speak to Artix or the other paladins, please tell them that I regret my misdeeds in life and let them know that I once again to serve good even in my cursed afterlife. Now… go. Sargoth awaits.