You can download minecraft x-ray mod 1.6.4
As you can see in this video this mod rocks . Minecraft xray mod is a one of thoes cool mods what allows player to cheat in game so please use it on your on risk in servers but on singleplayer have fun .
Some cool tags :
Minecraft 1.6.4 and 1.6.2 xray mod how to install download
minecraft 1.6.4 and 1.6.2 xray mod tutorial
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x-ray mod 1.6.4 installation tutorial