Creature - Zombie Wizard 2/1, 1B (2) Cards in graveyards lose all abilities. "I have an eternity to know the souls who are bound here, to behold their every facet. But moments from now they will be gagged and masked, and they shall be known by none other."
Illus. Matt Cavotta
Removes all abilities, even if they don't do anything while in the graveyard. [Future Sight FAQ 2007/05/01]
An ability that triggers on going to the graveyard from play is considered to trigger in play so this card won't affect that trigger. [Future Sight FAQ 2007/05/01]
An ability that triggers on going to the graveyard from other zones is considered to trigger after getting to the graveyard, so this effect will prevent that ability from triggering. [Future Sight FAQ 2007/05/01]
Cards with abilities that define how they enter play will not have those while in the graveyard, but if they are put into play from the graveyard those abilities will be applied as they enter play. [Future Sight FAQ 2007/05/01]
If Mistform Ultimus is in the graveyard, the Ultimus will lose its ability that says "Mistform Ultimus is every creature type," but it will still be all creature types. The way continuous effects work, Mistform Ultimus's type-changing ability is applied before Yixlid Jailer's ability removes it. [Future Sight FAQ 2007/05/01]