You are attuned to the physical and emotional state of your familiar. There are many familiars like it, but this one is yours, and you're acutely aware of that fact. It's tougher than it would otherwise be.
+5 to Familiar Weight
- The description of this effect contains a play on the initial lines of the United States Marine Corps Rifle Creed, brought into the public eye by the 1987 Stanley Kubrick film Full Metal Jacket: "This is my rifle. There are many like it but this one is mine."