I just about got 1-shoted by Sikozu...
For those of you new to duels, prior to (January-ish?) there were several opens which could kill even a well armored opponent in one shot/one round...which as why it was refereed to as one-shots.
Charge and Blastwave got nerfed but with the new items giving such high int boost and the extra 5 levels is becoming possible again to get high damage, at least with Blastwave.