Vanilla Chapter 9:
Visit the Mounds of the Dead: The Mounds of the Dead lie on the western side of the northern highlands.
Defeat the Barrow King: The Barrow King is buried somewhere close to the Mounds of the Dead. Find his barrow, open it, and defeat him to learn more of his role in the war.
Obtain a Black Ice Weapon: Learn to craft Black Ice weapons from the Frost Giants, or find one and equip it.
Buff yourself with Warpaint: Warpaint buffs can be learned on the feats page, or found in the world. Craft or find one, then apply it to yourself.
Summon Witchfire: Witchfire recipes can be learned through the Alchemical Powder feat.
Pour Boiling Oil from a Siege Cauldron: Place a Siege Cauldron, and use it to pour oil down the length of your wall.
Maintain normal temperature in the most Extreme Cold: Visit the coldest area of the Exiled Lands while maintaining a normal body temperature. You will need to combine food effects, special clothing and armor to achieve this.
Defeat Hrugnir of the Frost: Find and kill Hrugnir of the Frost
Equip a Nordheimer Armor Set: Loot a Nordheimer enemy for their armor, or craft it yourself from the recipes learned on the feats page.
Discover all the Giant-king obelisks: Listen to all of the Giant-king Lorestones to find out their history.
AoC Chapter 9:
Can't You See I Got Money?: Buy expensive jewelry from the Attire Dealer.
A True Collector's Edition!: Buy a special decoration from Bobby's Sanctuary.
Royal Painting: Buy a painting from the general store.