The Depths of Tolagal: Monster Kill! (5 kills in a single turn)

The setup is very hard to do, you have to lure 5 monsters to the stairs. Then switching between floors, whittle them down so you can 1 hit kill them. Get a blasting weapon if possible. You will need both a Haste Ring AND a Haste Potion. You could use a Polymorph weapon to change the enemies into easier ones then change floors quickly. I suppose finding a packed room and using Fire and hope for the best would also work, haha but thats a little more RNG, I feel.