Fading
From M:TG Archive, a library of Magic: The Gathering information
Fading is an obsolete keyword ability that represents two abilities.
"Fading N" means "This permanent comes into play with N fade counters on it" and "At the beginning of your upkeep, remove a fade counter from this permanent. If you can't, sacrifice it."
Fading works in a way similar to Planar Chaos's Vanishing, except that they work with different types of counters and that "Vanishing 2" means "Fading 1".