Aether Walker

Aether Walker is a Legendary Wand for the in Diablo III. It requires character level 70 to drop, and originally only dropped during the Season One for Seasonal characters. After the end of the Season One, it drops for normal characters as well.

The unique property removes the cooldown of (technically, reduces it to 0.5 seconds), replacing it with a (quite considerable) Arcane Power cost, making the spell function more like the classic version.

Obviously, Reversal rune, if applied, will have no useful effect with this wand. With Wormhole, the additional free cast will cost no Arcane Power, but will leave a 0.5 seconds cooldown after the 1-second window. For all purposes, Teleport will count as a resource spending attack.

As of patch 2.3.0, this effect works with Archon Teleport spell as well, removing its cooldown, but not adding any cost.

This effect does not effectively stack with Firebird's Finery, as the Arcane Power cost remains in place even if the cooldown is reduced by the set bonus.