You want a hard MMORPG to play? Play Elsword...

2nd Impact says hi. See that counter above the person's health? That's how many times he died clearing this dungeon on Practice Mode (exactly what it says, let's you practice a dungeon without spending anything), and it's only on Normal Mode. He's yet to try Hero's Road, which is the equivalent of Insane/Nightmare mode.

[video=youtube;YwbADIYJne4]http://www.youtube.com/watch?v=YwbADIYJne4[/video]