Defeat a living blaze in Lavastorm. Take a right after leaving the dock and head to -229, -129, 491 on the beach. The blaze there will scale to your level and attack; kill it.
Defeat a living snow flurry in Everfrost. Cross the water to a small glacier at 40, -19, 11 and defeat the flurry there.
Sub-40s characters should be careful crossing due to the sharks in the water.
Return to Jingle.
Thaw out NPCs in order (they will show on track if you have it):
64, -35, -1626 - Candice
224, -29, -1403 - Gardy Ex-Giftgiver
342, -30, -1396 - Mr. McScroogle
205, -29, -1371 - Queen Bunny
174, -37, -1312 - Snarf Frostfoot
Return to Jingle
Head to 208, -35, -1613 and fight the hoarfrost attackers
Head to 445, -36, -1426 and fight again
Head to 247, -35, -1241 and fight one final time
Speak to Jarok Frostpetal at 291, -36, -1269 to complete the quest