Question: what are ice storm challenges?
Answer: Complete Ice Storm challenges (6)
Destroy Ice Fiends (250)
Deal damage with Explosive Weapons to the Ice Legion (5,000)
Destroy Ice Brutes (100)
Deal damage with Assault Rifles or Pistols to the Ice Legion (10,000)
Destroy Ranged Ice Fiends (150)
Destroy Golden Ice Brutes (20)