Seeing this card as a standalone, it should be fine.
However, with Phantom of Ignorance, Voidstalker and potential other Void cards, it could become a problem. If you got 3 different cards of that kind, you can already fill 18 spaces in your deck. Add sundials to browse through it faster and prevent attacks (The Phantom and the Dragon don't have to attack, right?) and you've got an extremely strong deck.
In general I think Void cards with high costs could become an issue, because they give you great advantages while the enemy can't make use of all the quanta, given he doesn't use a firebolt deck or has lots of hourglasses.
Nonetheless, I think the idea is great.