That's a funky twist on Future Sight. The "once per turn" is a sensible restriction to keep it sane.

I fear the mechanic will need adjusting, though, because virtually nothing lets you look at cards on top of a library without letting you put them back in any order - because people are generally prone to reorder cards they're looking at. This is particularly bad from that point of view for letting you do it at any time.

Is this better? It's more what I originally intended, but then I was seduced by Sphinx of Jwar Isle.

Much better. It's a pity to lose the funky wording from Sphinx of - I look at the top card of my library - Jwar Isle, but I think it's sensible in this case.

I'm not sure how this ended up as 4x legendary.

It deserves it, though.

Mmmm. I fear it might be a bug in my type-smoothing code. You've got Legendary entered in as a type, not a supertype, so I think it will try to remove it from the type and add it as a supertype. If for some reason it fails to remove "Legendary" from the type, though, then it's possible each edit event might add another copy of it as a supertype... I'll investigate.

Oh come on, it's got everything else four times. It's clearly serendipitous.

Indeed, it's oddly appropriate.