Vanishing is an ability that involves time counters, much like Suspend. This ability basically gives the permanent a number of times allowed to be in play. When the card comes in play it is given X time counters where X is the Vanishing number. Then at the beginning of each of the player's upkeep, he/she removes a time counter. When the last time counter is removed, the card is sacrificed. This ability first appeared in Planar Chaos and was printed in Future Sight as well.