Owch. I'm afraid you can't do that: the game doesn't track specific cards in people's hands. The best you can do is "When ~ dies, reveal your hand. Shuffle a card with that name into your library if able."

I obviously need to reword it :-) You are supposed to shuffle Jahar back into your library.

hopefully that works better

Oh, I see! Er, yes, I guess that's fine. The original wording probably did work, actually, I just got completely the wrong end of the stick.

lol - but do you like the card?

It seems slightly small - I'd expect it to be 3/3 - but otherwise, yes, looks fine. It's like a less crazy version of Sun Titan (which was obviously amped in power massively, due to being a mythic and a marquee card). Amusing with something like Momentary Blink, but it doesn't really achieve very much.

Cost should have always been which is why it was a 2/2. Also, he should have been a Knight rather than a soldier. He is meant as an enabler in a Knight tribal deck - recovering important parts of the deck (Knight Exemplars and Knight of the Reliquarys for example - that have hit your graveyard. In fact,he can recover 99 of the 159 Knight Creatures ever printed.

You make a small edit 6 months later, you get a comment 6 months later. I wonder if Alex understood just how tricksy this card is with Momentary Blink, seeing how, when he returns to the battlefield, he can return the Momentary Blink to your hand... making him a pretty cool 'unkillable' blocker.

I was originally envisioning him as an enabler in white weenie where he could get key cards back - especially in a Knight deck. I have toyed with him only returning creature cards but that severely restricted his usage. As is he is a fairly handy "toolbox" card.
And yes, he can shenanigans with Momentary Blink to become quite annoying for your opponent.