Hakkon Wintersbreath

Leave the Old Temple and interact with Ameridan’s memory by holding the orb floating in the air.

This unlocks the side quest Where Once We Walked.

When you’re ready to fight Hakkon, you’ll find the dragon on the southernmost shore of Frostback Basin.

As you approach Hakkon you will be attacked by a number of Gibbering Horrors. Deal with them quickly as they can inflict significant damage if ignored.

Hakkon uses Cyclone to draw you and allies in; try to run away from him if you’re a mage.

Hakkon uses elemental breath for ranged damage and can stun by screeching. He will also use powerful sweeping attacks with his claws. Pay attention to his claws when they’re raised, as a sweeping attack is imminent.

Using Mark of the Rift will cancel the effects of Cyclone while dealing significant damage.

At 25% health, Hakkon will fly in the air and circle the group before inflicting damage frost breath. Cast barriers as he approaches to negate much of this damage.

At 50% health, he will fly in the air again and do another round of ice breath. He will then land on the central platform before summoning another group of Gibbering Horrors.

Once you’ve killed the Gibbering Horrors, Hakkon will return to the ice. The same battle patterns will reoccur until Hakkon is brought down to 25% health, at which point another wave of Gibbering Horrors will spawn.

Deal with them and then focus again on Hakkon. Once he reaches the ground, he won’t fly again.

At the end of the battle a cutscene will follow. Loot the dragon.