What would be a synergistic "magic" to go with "Illusions"?

Perhaps you could go a different route with this, maintaining the Illusion aspect. You could specify that Larissa is a visual illusionist, and have Melissa be an aural illusionist. This way, between the two of them, they appear all powerful. They have power over nothing concrete at all, but through their illusory abilities, can influence everything that is concrete, giving them the power that they lack.
Just a thought. Good luck.

 

My first thought was the ability to create solid but invisible shapes. If you want something more "modern," maybe she can compress and reshape objects, while maintaining their properties--this would interact more directly with the properties of technogical objects, while still allowing her to give illusions a solid core.

 

What about non-visual illusions? The ability to create sounds, smells, sensations against/for one or more people. That way, when the two are together, they can completely alter the reality of those effected by their powers.

 

Hi,

Why not have two illusionists working in two different ways. I'm not sure if this is what Pythagorus was getting at but it seems to me that there are two ways to create an illusion. You can either bend light - which is useful as it gives you illusions, invisibility, flash blinding and a laser weapon but doesn't do a thing about noise. Or you can bend the mind instead, which gives you a whole different set of illusions - i.e. you can make people see and hear what you want, and perhaps get them to not notice lots of things, walk right past that ticking time bomb etc. And for synergism your illusions by using both systems would be complete. People would see exactly what you want them to see, and not notice any discrepancies like noises or smells.

Cheers, Greg.

 

You could consider mind magic of some sort, such as influencing emotions or slipping suggestions/false information into a person's mind. The person being affected wouldn't notice unless, for some reason, they question the validity of the suggestion and why they're thinking that. People usually don't question thoughts that they believe are their own, though.

 

hmmm.... way I see it, one of the problems with illusion magic is that it's a "soft" magic, you can wrap your prey in all sort of illusionary webs, but if they manage to get past that you're pretty much ****ed. You mentioned gunpowder before, so maybe an offensive ability based off that? Maybe something along the lines of making gunpowder (and potentially other things) explode remotely. You could cause an enemy's ammo to misfire or use illusions to cover up a minefield and all sorts of other "fun" traps.

 

You could build the idea that illusion is mind-based, and "soft": the more strong-willed or just confident the enemy is, the less of a hold you have. But if the other magic is actual telekinesis or anything else material, it can be mixed in with the illusions to keep the enemy guessing what's real-- and break down their will to resist it, so they're more easily dazzled, which also helps the tangible attacks hit harder from behind that cover, and so on.

 

Push and pull

First sister pushes the target into her chosen illusory world.

Second sister pulls the target back into the real world.

First sister pushes target back.

Cycle continues until the target is mentally deranged.

 

Something "real" would be my first thought, since the first sister in an illusionist. Maybe something to do with creating friction? That could cause gunpowder to explode by creating heat. Or, another modern idea, but interacting with computers or perhaps traditional elemental powers but over something like steel or plastic rather than fire/wind.

My other thought, if you wanted something that truly worked in tandem, was that the second sister could maybe excrete some sort of drug that made the target's mind more pliable to an illusion.

 

From what I have read from all the responses, my only recommendation or idea in this particular subject is the use of a form of psionic ability. Even put an emphasis that since they are twins, the powers are divided between the two. Alot of people believe that twins are two halves of 1 whole person. Psionic ability is described easily as the ability to manipulate energy. Mental energy, physical energy and anything of the sort. Therefore, between twins, the power is split. But together they are unstoppable.

Example: One twin can manipulate the mind. Bending the ideas and thoughts of those around her. You can even go so far as you "convince the person you are manipulating to think you are not there." Essentially rendering you invisible.
The other twin can manipulate physical energy. Bending light, electricity or as you had referenced before, the ability to control combustible substances. I.E. gunpowder. (Cause a bullet to ignite/prime.)