Edited again.
Renamed Defensive Weaponry and expanded it to let you use Weapons for all unarmed attacks, barring compels. It's not actually a terribly significant upgrade, but it makes the upgrade look more impressive.
It's not a perfect solution, but since no one has proposed a better one...
Also expanded the array of options for area attacks.
I think I've covered pretty much every natural weapon I can think of, now. So this power might just be complete.
Of course, it has a truly excessive number of options now. But they're all very simple. I don't think it'll be a problem.
Don't hesitate to point out if there's something wrong, though.
Crossposting this to Custom Powers thread.
NATURAL WEAPONRY [-1]
Description: Your body contains or can produce some kind of weapon or attack.
Note: You have to pick one type of weapon (eg. fire breath, metal claws, three-foot tusks) when you take this power.
Skills Affected: Fists, Weapons, Guns
Effects:
Natural Weaponry. Your body contains a weapon with a rating of 2. This weapon has a no range, is not capable of spray attacks, benefits from Strength powers, and is wielded with the Fists skill.
Potent Weaponry [-1]. Your natural weapon has a rating of 4.
Integrated Weaponry [-1]. You may use your Weapons skill to attack, defend, maneuver, and block unarmed or with your natural weapon.
Ranged Weaponry [-1]. Your natural weapon has a range of three zone and is capable of spray attacks. It may be wielded with the Fists, Weapons, or Guns skill. It cannot be used with the defense trapping of Weapons unless you possess the Integrated Weaponry upgrade.
Area Weaponry [-1]. Your natural weapon may be used to make zonewide attacks.
Selective Weaponry [-1]. (Requires Area Weaponry) You do not harm yourself when making a zonewide attack against your own zone with your natural weapon.
Explosive Weaponry [+1]. (Requires Area Weaponry) Your natural weapon may not be used to make attacks that are not zone-wide.
Imprecise Weaponry [+1] (Requires Selective Weaponry) You suffer a -2 penalty to the accuracy of any zonewide attack that you make with your natural weapon.