According to google, it is from dragon 372, some manual of the planes destiny. It supposedly has some encounter power which gives you an AP on a crit against a designated target (and using this does not count towards your 1 AP/encounter limit), so you can potentially get a lot of extra action this way (especially if you use some multi-hitting power such as twin-strike) and at lv 30, they automatically deal max damage against the cursed target.
No comments on its power level though.
No comments on its power level though.
