CURATOR COMMENT-You need to capitalize the word, 'Creature', in the TYPE section of your tables.
I like the fact that this card has a pseudo-Phoenix rebirth feel to its effect, although I wonder how nasty this card would be with a Nightfall/Eclipse; (Shadow) Ghost would be a pretty nasty attacker that would still deal damage with the permanent up, and if it died, its Shadows would still be minor attackers with a decent amount of HP to fend off against some attacks.
Have you given thought to naming the ability of the Ghost/Shadow by chance?