Officer of Executed [EXE] from Piken Square.
New weapons and the Mystic Forge
I don’t think they can be obtained in the Mystic Forge since they’re only skins. The champion loot drops are the only way to get them.
They are not just skins but actually weapons :
http://wiki.guildwars2.com/wiki/Genesis
http://wiki.guildwars2.com/wiki/Entropy
You can see for yourself on the BLTC as well.
Officer of Executed [EXE] from Piken Square.