Vanishing is a common Enchantment — Aura card from Visions (VIS), collector number 48. Current market price: $0.42, TCGplayer market prices via Scryfall.
Enchant creature {U}{U}: Enchanted creature phases out. (While it's phased out, it's treated as though it doesn't exist. It phases in before its controller untaps during their next untap step.)