I actually came up with these thinking of them something in terms of a fighting game akin to a cross of classic Mortal Kombat and Soul Calibur.
[Cocytus Stats]Endurance: 3/7
Strength: 3/7
Reach: 7/7
Combo: 6/7
Grab: 7/7
Speed: 6/7
Mobility: 6/7
Energy: 4/7
[Cocytus Specials]Icy Grip: Cocytus projects a chain-scythe through a rift in the ground, which comes up from under the opponent, pulls them down, then pulls them up beside him.
Meat Hook: Cocytus projects a chain-scythe into a rift in the air that opens up and projects downward from above the opponent, grabbing them and lifting them upward for an extended stun.
CryoGyro: Cocytus twirls a chain-scythe around himself to deflect projectiles and slash nearby opponents.
Cold Feet: Cocytus projects a wave of ice spikes across the ground.
Frostbite: Cocytus projects a wave of falling icicles from the sky.
[Cocytus Finishers]Absolute Zero: Cocytus will drain all heat from the area and leave it in a frozen still. Everything will stop moving, and the enemy will freeze solid. The temperature will then return to normal, and the opponent will shatter.
Frozen Soul: Cocytus will disappear into a rift in the ground, then another will open up beneath the opponent and project two chain-scythes to grab them, pulling them down as they slowly freeze from the legs upward, screaming as the rift closes up around their frozen, outstretched arm. Cocytus then returns on his side of the screen.
Blood Slush: Cocytus extends a chain-scythe down from a rift in the air over the opponent, lifting them upward to bleed out. The blood drops freeze into narrow spikes, and the opponent falls off the scythe and is impaled on the blood spikes.