Olympus Raids

After the blizzard a debuff appears that opens a damage window on the boss.

Two pre-rooms (6 buttons/10 mobs, then 6 buttons/8 mobs). In the boss fight stay close to the frost deflectors to survive the ice attacks.

Two pre-rooms with buttons and monsters must be cleared first. Valehir uses poison attacks and applies debuffs (Fog of Fear, Plague Breath, Weak Dragon Venom) while granting itself buffs (Fog Shield, Power of Decay) that must be removed with specific consumables or by killing linked mobs.