Used in:

• Tainted Avalanche Ale (Brewing)

Dropped by (***no spawn table):

• Iceclad Ocean
• a frost giant scout (3.9%)
• a shadow guardian (4.1%)
• Graktar Bluehammer (1.4%, 0.014 avg drops per kill)
• a snow dervish (2.5%)
• a frost giant elite (3%)
• pulsating icestorm (17%)
• Eastern Wastes
• a snow dervish (21%)
• a blizzard dervish (26%)