Red cards love to make people discard their hands, but in terms of redrawing cards, the sky's the limit here
He will always attack as a 4/4, since he counts himself, and there are going to plenty of times where you can Scry additional times to buff him, especially because his Scry ability will theoretically allow you to find even more Scry
You can exile that creature and return it to the battlefield under its owner's control at the beginning of the next end step
The primary power of phasing is it is the single best protection in the game
They dont feel like dead cards in your hand, nor do they feel too narrow
3 power makes it a much better blocker, able to chip in for meaningful damage here and there, and a real threat later game when your hand is deployed and you are attacking with the team