Yes it does, it has the same shape.I see how it could be compared, the only thing thats diffrent is the texture/colors.
Look closely at the detail on the blade of the Excalibur from the game, then compare it to the one in Blockland. Similarities? No. Plus the handguard needs to be bigger, and the color is way off.
Also, the Excalibur from Terraria is fairly huge, while the one in Blockland looks just like any other sword we get in Blockland.
Please play the game before you make these random, untrue remarks.