Tradeskill Guides – World of Warcraft Pro | Brings Game Experience

The only recipe not taught by a trainer is [Manual: Strong Anti-Venom]. [Manual: Heavy Frostweave Bandage] is a world drop from any level-75 or higher humanoid creature
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Heavy Frostweave Bandage – Item – World of Warcraft

Heavy Frostweave Bandage is a level 80 bandage. It is crafted and a quest reward.