Here's another animated sprite sheet. This one is the annoying Green Mush or Green Caps found on the top floor of Henesys Hunting Grounds, and for lower level starter characters no matter the class, except maybe for some magicians and archers willing to basic attack from hay bales, prove to be a challenge to deal with! Along with these greens on the top floor, there are dark stumps which have stupidly high levels of defense and the next highest HP pool compared to these greens, making the top floor even more challenging to solo unless you're roughly level-17 thur 20...

I used to laugh at these thinking to myself... What's so hard about these things? I can take them!

But then again I chose the archer class, and yes while I had to spam basic attacks to conserve MP for fancy attacks once I level up enough, aforementioned Lv17 by which point I had maximum attack range and reach to targets, as well as a decent enough damage RNG with equipment to again... shoot these things from hay bales and out of their damage trigger range, I pretty much shrugged them off as a simple annoyance. It also helps that they have a rather lazy spawn rate at HHG's top floor, so that might be why I considered them as trivial. xD

Find yourself in the middle of a platform without any safe spots to shoot from, and these guys have numbers, and you stupidly agro the whole bunch... You're gonna get ZERG RUSHED TO DEATH! xDDD

Again Maple by Wizet and Nexon of S. Korea
Fanart sprite sheet with added gif animations by  NezumiYuki