One of the jokes in modern magic design is how much text it takes to make the card Oubliette work. There's a generation of white demi-Oubliette effects that simply exile the card. But, by doing so, they destroy the state and associations of the target (which Oubliette painstakingly preserves).
I think I've found a way to achieve this effect with a template that fits in a standard card frame. But I keep going back and forth between how some of the details need to be handled and am interested in other thoughts;Celestial Imprisonment