Kyros is one of the Unused Colossi who, for one reason or another, did not make it into the final released game. His name means "King Ice"
Defeat (Made-Up)
To defeat Kyros, you must first shoot the weakspots between his second and third armor-plated ridges on both sides. This will cause him to rear up and shoot razor-sharp, shrapnel-like icicles at you. He will summon a blizzard to try and hide himself in. While he is shooting the icicles at you, find your way through the blizzard and jump up to stab the weakpoint on his stomach. He only has a small patch of fur so be careful how you time the jump. Once he is stabbed, his back legs will buckle underneath him, and he will stand on his front legs like a gorilla walks with its fists. You must quickly climb up his front right leg because only this one is climbable, climb under his chin, and stab the weak spot there multiple times. He will lower his head in pain, allowing you to climb up his neck to stab his main weak point. Take it out, and the mighty Kyos will fall.
Location (Made-Up)
To find Kyros, you must head through Cenobia's Ruined City and find a small crack in the stone wall on the far right grassy area. The crack is just big enough for Wander to enter. You will enter a huge frozen tundra. There will be five icicles that you need to hit with your sword, while you can still hear the wind howling through the ice and snow. Hit each one in numerical order to produce a strange, ominous sound, like something ancient and faraway, that was lost long ago. The sound awakes Kyros, who will shatter through the ground in front of you.