This card has a great synergy with Oty decks, It will knock down those beats with too much HP, while possibly accidentally killing them if your not careful.
The ONLY thing I would do is make it a Time card instead of Gravity. Since this is getting used in a Grav/Time deck, its a Godsend in a Gravity deck, just use all Gravity cards and set your mark to Time, then almost nothing is out of the reach of your Otys.
As a Gravity card I feel like it's a little too good. As a Time Card, costing the same amount only with Time Quanta, I feel like it is right on the money. Even still, it's a good card as is.