Originally Posted by
exk
The one that I clearly recall is Paula's (Platinum Bishop) event. The final mission has the Maou boss who deals about 2k damage. It doesn't seem high at first, but when his health falls below 50% HP he will be able to attack from a distance and he can attack faster. He also has extremely high health so high DPS is needed if you want to kill him during the duration of a tank's buff. The other thing about this specific mission is that 2 shadow clones of him will spawn, who are slightly weaker than him but has the same properties. When all 3 are together, it is nearly impossible to tank all 3 of them at the same time. I've had an AW42 Jelius die (5/5 skill used) instantly when I wanted him to tank all 3 of them.
I want to say more, but then I'll spoil the difficulty even further. It's better to experience it yourself just like how people liked Sorano's event after experiencing it. It took me a lot of SC and many tries before I was able to get a 3-star clear.