Splash or AoE?

This skills can kill multiple monsters, but not sure which I should call it.

Seems to be splash.. since I got hit by another monsters counter.

It's splash, AoE is way different.

Pay attention to the wave that comes out when you use it, it comes out like a spray, so the angle and direction of your target will make it spray in that direction...

Strange that they didn't make it area based so you can click anywhere to use it towards that direction (like charged fist).