Maelstrom Djinn
Creature — Djinn
Flying
Morph 
(You may cast this card face down as a 2/2 creature for 
. Turn it face up any time for its morph cost.)
When this creature is turned face up, put two time counters on it and it gains vanishing. (At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.)
Hideaki Takamura
Future Sight (FUT)
• #39Rulings
If Maelstrom Djinn turns face up and then is somehow turned face down, it will still have vanishing and time counters. The vanishing ability will continue to work as normal. If it’s turned face up again, it will get more time counters on it, but it will also get another copy of vanishing. Both abilities would trigger during its controller’s upkeep.
(wotc • 2007-05-01)
Rulings
If Maelstrom Djinn turns face up and then is somehow turned face down, it will still have vanishing and time counters. The vanishing ability will continue to work as normal. If it’s turned face up again, it will get more time counters on it, but it will also get another copy of vanishing. Both abilities would trigger during its controller’s upkeep.
(wotc • 2007-05-01)