Dead Sun - Advena soldier

The alien race that shocked humanity as they suddenly encountered them face-to-face on Eon, when they fled there. However, these advenas on the planet came from a different galaxy, and did not evolve on Eon, as they themselves also had to flee and find a new home, arriving to the planet only 200 years ago. They are incredibly tall, strong and agile, making them superior to humans in every way, and they know it. They are like hyper-intelligent, merciless animals who doesn't shy away from taking advantage of humans and oppressing them. It seems to be almost impossible to fight or even defend against them, as they can come up with all kinds of intelligent plans and tactics to get inside humans' buildings and take them out, even if they are wastly outnumbered.