Like others said, I think with the given name this card should be in water. Also, as has been said, Time already has Eternity to do this sort of thing. I like the idea of adding another minor ability to the card beyond preventing deckout, because as is it would probably be rarely used except in very niche decks. Mormegil's idea of having it cast precognition is alright; that also fits the hourglass theme, and it's costed fairly. Thematically, Freeze/Congeal would also make sense as an effect for a frozen object to cast.