To get this you'll need a normal Excalibur first which you can get by killing any of the Hardmode bosses , it'll require 10 hallowed bars to craft Excalibur. And then you'll also need a Broken Hero sword which is a drop off of Frankensteins and Swamp Things during a Solar Eclipse. And the result would be a much faster blade than True Night's Edge!
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The True Excalibur is a sword weapon that is crafted using the Excalibur and the Broken Hero...