Hey, one of my players (using the GM Kit's Quickstart Character Generation) rolled up a Weapon-Master that uses a Magic Sword. His idea for the character is that he has a magitech sword that he uses different capsules in it that produce different effects. The closest thing I could analogize it to is the Caster Shells from Outlaw Star, except that have a lasting use to them (put one in and your sword glows with elemental fire for the rest of the fight). At first I figured this would be easy, just use Variable Descriptor 2 (elemental magics), but then he got into having capsules that did other things like turned it into a taser-like weapon that stunned people. And using those capsules with other weapons he'd make later on.
So, my mind then when to something a bit more elaborate in the construction of the power. That involved equipment.
The first part is that, charging a premium of adding a one-point Feature to the sword, that the capsules could built as equipment. And since they're equipment, they have certain complications built into them (takes a Move action to swap capsules, sometimes capsules malfunction, etc.). But past that, they work like ammunition for any of the weapons he'd build afterwards.
So the build would look like this:
Magitech Sword: Strength-based Damage #, Easily-Removable, Feature: Can use Magitech Capsules, Multi-Attack, Penetrating (x pts.)
Equipment: Elemental Magitech Capsules (Variable Descriptor 2 [elemental magic]), Stun Capsule (Alternate Effect - Affliction # [resisted and overcome by Fortitude; dazed and vulnerable, defenseless and stunned], extra condition, limited to second degree, progressive)
So, too complex? Too powerful? I think it's a bit of an elegant solution, especially when his next idea is a shield built about the following way:
Magitech Shield: Immunity 10 (capsule element damage), Half Effect, Feature - Can Use Magitech Capsules, Removable
That one I'm a little worried about being too powerful, but I don't expect it to be too much of a gamebreaker. At least not in my game.