You punch your gythka into your enemy, causing it to double over in pain. You then heft the weapon up, ready to bring it crashing down if your foe tries to stand.

Daily ✦     Martial, Reliable, Weapon
Standard Action      Melee weapon

Requirement: You must be wielding a gythka.

Target: One creature

Primary Attack: Strength vs. AC (main end)

Hit: 2[W] + Strength modifier damage. You slide the target 3 squares to a square adjacent to you and knock it prone. Until the end of your next turn, you can use the Gythka Arc Attack power.
Level 25: 3[W] + Strength modifier damage.

Daily ✦     Martial, Reliable, Weapon
Immediate Interrupt      Melee weapon

Trigger: The target stands up while you are wielding a gythka.

Secondary Attack: Strength vs. AC (off-hand end)

Hit: 1[W] damage, and the target cannot stand up (save ends).
Level 25: 2[W] damage.

Published in Dark Sun Campaign Setting, page(s) 109.