Bio Cannon

Bio cannon [minor] by Iczer

'Oh yeah... this lump. It spews corrosive goo. Not exactly a good impression on a first date'

The character has a spare limb, segmented and jointed like a spare arm, but grows from the shoulder, back, hip or even the back of the head. The limb converts HP to deadly attacks.
One HP generates a 4D6 corrosive blast (+1 damage per level) that can fire out to 80 feet with +3 to strike on an aimed shot. the limb can also bash inflicting 1D6 damage plus any PS bonus, but cannot wield weapons. The limb provides one extra attack per melee that can be used as part of the bio-cannon or as a bashing limb.

The bio-cannon has two other functions:

1) It can eject other ranged attacks possessed by the character, adding +1 to strike with aimed shots, adding +1 damage per level and adding 30% to the effective range.

2) It can extend the range of another power by 80 feet (even powers that work on touch). It grants a +2 to strike in this case.

Alternative: The character can choose not to have the extra limb, and instead have the bio-cannon as part of an existing limb. It is still obvious when looking at it, looking like a biological gun barrel, but is concealable by clothing. This robs the character of the extra attack and bludgeoning options.