Yanchissas could be found at the endless dungeon. They are violet creatures that could be threatening if not killed quickly. Extremely dangerousif found in packs but they are quite rare
Yanchissas attacks an attack that halves your life and attacking you quickly using curse. Yanchissas also attack an attack that dont let you move for 10 secs so they are quite dangerous but luckily, they have low xp.
Blade storm could be quite useful but remember to bring a lot of Mana potions and Potions.