Dropped by (***no spawn table):

• Iceclad Ocean
• a frost giant scout (4.8%)
• a shadow guardian (5.3%)
• Graktar Bluehammer (4.3%)
• a snow dervish (1.6%)
• a frost giant elite (1%)
• pulsating icestorm (12%)
• Eastern Wastes
• a snow dervish (15%)