Frozen Mountain is a set in The First Berserker: Khazan with five bonuses.

Bonus

2 Set: Health Recovery Increase > 15%

3 Set: Unscathed: DMG Increase > 20%

4 Set: Extra Endurance > 10

5 Set: Brutal Attack: Health Recovery > 10%

6 Set: Unscathed: Stamina DMG Increase > 20%

Drop Location

Weapon: Spear,  reward of soul world in Stormpass, Mission 2.

Rest of items are random drops from NPCs:

Yetuga: Last Boss in Mount Heinmach, Mission 1.