So... Cereal, you're proposing an extremly overpowered mindgate for Gravity. Suuure, that'll work.
I just noticed this has a good synergy with aether, Mindgate allowing you a few copies of the card, and allowing you to see if it's a card the opponent would need, and then using this to take it away!
It also has a very slight synergy with Darkness, since Nightmare would stop the enemy from drawing the next card, too. Card lockdown ftw!