With the end of Legion, the Mage Tower was closed, until now, when Legion Timewalking brings it back.

Completing a challenge successfully rewarded you with a special Artifact weapon skin and further tints that could be unlocked. It required a building rotation that players contributed to with the world questing on the Broken Shore to unlock, and the Nethershard currency to buy attempts past the first one each time it was up (until the end of Legion, when the building was up 100% of the time and the cost on attempts was removed). For those unfamiliar, during Legion, from the launch of 7.2 until the BfA pre-patch, the Mage Tower was a solo skill challenge players could undertake on the Broken Shore. In World of Warcraft’s upcoming patch 9.1.5, a popular feature from the Legion expansion will return – the Mage Tower.

A new post is forthcoming that details the actual rules of TWMT as defined at present!) (Update : These ideas are all speculation and most have been disabled or worked-around with the recent PTR testing of the Timewalking Mage Tower.

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