Shadow Double

Superpower; at-will, std, ranged, concentration; you create a duplicate of yourself, which acts as your minion. You share a telepathic bond, allowing you to communicate silently with it. The duplicate has the same abilities and statistics as you, and can manifest powers, but if one of you uses a power, that action is locked for the other that turn. That is, if you or the copy uses a standard-action power, the other can't spend a standard action on a power that turn, but can spend their standard action on something other than a power; same for swift/move/etc.

Epic: your shadow double acts independently (still controlled by the player), has no range limit, and requires no concentration. Also, if one of you dies, regardless of which one was which, the remaining one is always you — never the double.