Cyberelemental? A spinoff of an electricity elemental that zips about the 'net like a virus?
It all depends on what elementalism means in your culture. I just got back from the Cheyenne Sundance in Oklahoma, and it was interesting to see what objects became their metaphors for life. Like, Zeus wasn't a lightning god because electricity was somehow important to his nature. Zeus was a lightning god because lightning was the scariest thing on the planet at that time. Metaphors grow out of things that are important to us.
So play with that, and what do you get?
Auto-elemental.
A few days old, it looks like an VW bug and drives around, killing pedestrians. It feeds on belief, grows, and becomes a Buick. It runs down more folks, runs cars off the road, grows into an SUV. Soon it's powerful enough to be the world's fastest, toughest, ANGRIEST semi. If the PCs don't stop it, it'll get to the junkyard and come into its full potential...
Cellemental
They look just like a brand-new phone with lots of features and gadgets. They have some kind of domination ability, like a puppeteer. Once somebody picks one up, it becomes THEIR phone. They try to use it everywhere. It's got all their friends' numbers in it. It gets great reception. It has "this really great rate that gives them all kinds of free minutes". It preys on the weak-minded, those with a subconscious feeling of inadequacy because they can't or don't communicate. They DO communicate now, calling everyone, talking in restaurants, movie theaters, getting glares as they talk instead of ordering at the coffee shop. Finally, their attention fully on the phone now, they make some foolish mistake, have an accident. And when they die, they are found to have been malnourished, haggard from lack of sleep, and eaten up from the inside by some kind of cancer.
And lying next to them are two really KILLER cell phones.
