Obviously it's a gravity card.
Gravity Bind:
-Type: Spell
-Cost: 2
-Effect: Randomly binds up to three of your opponent's creatures. Bound creatures must attack at the same time.
Gravity Chain:
-Type: Spell
-Cost: 2
-Effect: Randomly binds up to four of your opponent's creatures. Bound creatures must attack at the same time.
It doesn't sound all that useful at first, but once you think about it, it is. It's really for use in conjunction with shields, but I think it would work well with gravity pull (on your own creatures) as well.
Just to highlight some combos that come to mind:
Gravity Bind + Dusk or Fog Shield: The creatures bound together must attack as though they are one. So you increase the effectiveness of your shield (this further depends on if the game recognizes it as one attack, or up to four attacks that occur simultaneously, and each one must succeed for the group to hit you).
GB + Bone Wall: Bound creatures all hit the same wall.
GB + Procrastination: If one of the bound creatures is under the effect of procrastination, none of them can attack.
GB + Petrify: If one of the bound creatures is petrified, none of them can attack.
GB + Freeze: If one of the bound creatures is frozen, none of them can attack. (goes well with permafrost shield)
I'm sure you can think of more combos on your own.
Depending on how it works, the game either recognizes an attack by bound creatures as one attack or as simultaneous attacks. It all goes from there on how certain effects affect the group. Also, if it's the former, I think it would be the sum of their attack is how much damage is dealt. If they go up against a damage reducing shield, the shield would take damage from the total, not from each individual. If it is simultaneous attacks though, the shield would absorb damage from each creature.
Anyway, go ahead and comment. Quanta cost isn't set in stone of course, so don't decide if it's good or bad based on that. If it's a little OP for only two gravity quanta, it could be raised.