Historical Rules · 1 May 2012
Rule 702.61a
Official source text from the 1 May 2012 Rules release
Vanishing is a keyword that represents three abilities. "Vanishing N" means "This permanent enters the battlefield with N time counters on it," "At the beginning of your upkeep, if this permanent has a time counter on it, remove a time counter from it," and "When the last time counter is removed from this permanent, sacrifice it."