Summary
Covers hidden beta items with unusual effects: a Mining Axe (Deadmines) allowing ore mining without the mining skill, letting characters run two gathering professions at once. Covers the Coldflame Saber (Shadowfang Keep) enabling melee 'battle mage' play, and a Cozy Sleeping Bag granting a 3% XP buff that stacks with cooking's 5% bonus. Corroborated directly by PC Gamer and Yahoo Tech articles describing the same rule-breaking items and noting Blizzard deliberately hid them from dataminers to encourage organic discovery.