Please, remain calm and tell us exactly what happened.

I was running up a hill when I saw it. It was wearing all black, and it was running towards me. Running fast than I've ever seen anyone run. I backed up quickly, but he leapt over the hill and towards me. He had a sword of green light, like the weapons his men were firing. He ran towards me so quickly I could barely see-- I'm sorry, I just... I

Go on.

I ran back to our line as fast as I could, into the trenches we had made. There was a walker there, I thought I was safe, I crouched down and fired on him, but it was like he didn't even notice. He flicked his sword, and my shots went flying. He leapt up to the top of the walker and slashed, and it exploded. Then he turned to me and threw the blade with inhuman strength, and it flew towards me, and slashed my leg- this is just... too- I'm sorry. I have to go.

(The single biome ice world was not taken. Icelandic forces fell back to the capital ship in orbit, and back to the nearest outpost. The superhuman blade-wielder is believed to be a "Guardian." They wield weapons similar to our blades. Recommend immediate action.)