Do not battle with 2 same kind of snakes continuously and take extra damage, and do not move more than once between battling 2 snakes of positive/negative during the battle with the Mourning Lover.
Do not battle with Duke's Servant or Duke's Bodyguard during the battle with Duke Inferno, and defeat Duke Inferno while he is not in any Aura of his servant or bodyguard.
Do not battle with any "Angel" during the battle with Encolli,Angel Maker, and also do not fight with Guilt when they are in range of 2 or more Auras of "Angel"s.
During the battle with Monoi the Pandemic, let all grids be covered by the poisonous trap (except where Monoi the Pandemic is). Meanwhile, step on the poisonous trap less than or equal to 22 times.