Once Tethys settled into her stance, Arali took a moment to size her up, then moved in. An obvious attack; the simple, classical thrust. To anyone classically trained, two possibilities seemed clear. The direct approach; try and bait the target's guard in one direction, then swerve and thrust through the other direction. Or misdirection; the thrust was a feint, for some other technique.
The truth was neither. The straight thrust was a straight thrust, and struck the base of Tethys' blade with precision. A hard strike, but Tethys' guard held easily enough.
Then, Arali's blade rippled. The glass-like structure expanded rapidly, rushing forward around Tethys' blade and slammed into the base of her rib cage, knocking the air out of her lungs.
((I'll just give you the first go to take that maneuver. It'd be rude to go before you have time to assume your stance.
Lightsaber:
3eP+1eA+1eB+2eD+2eS 2 successes, +1 advantage from my fine-tuned emitter.
11 base damage, 3 from deadly accuracy, 2 from successes, one from converting advantage to damage makes 17 strain damage.))