Since Xelax and I just had this discussion on Kong, I'll just clarify for future reference. Gravity Pull makes a creature take damage from one attack at a time. So if we have two creatures, the first would damage the creature marked by the fox, and if that creature died, it would then attack the fox, since the fox no longer would have a target to redirect the damage to. This is how GP works, and would thus prevent this from being OP.
Additionally, it only has 2 HP. Easy to Lobo, Freeze, kill, etc. In summary, I like it.