* Marrow-Gnawer - Added missing supertype "Legendary" attribute.
* Xathrid Demon - Fixed tooltip text.
* Kheru Spellsnatcher - Fixed possible null pointer exception.
* Commander - Fixed possible error if the commander has no mana costs (I'm wondering which commander that was?).
* Gideon Jura - Fixed that first ability was still applied also if Gideon left battlefield meanwhile.