Kalle Demos (The Legend of Zelda: The Wind Waker)

14 years after its initial release, it was revealed that the second boss in The Wind Waker, Kalle Demos can be defeated in just one hit. So I am sure you are wondering “well how do you do it?” Complete the quest and obtain the forest water. Once you have the water, throw it at the boss, and he is out for the count.
Margwa – (Call of Duty: Black Ops 3 Zombies)
A rather annoying enemy to encounter in BO3‘s zombie’s mode, the Margwa is a potential goldmine if you’re looking to grab a few extra bucks.
If you’re anxious to get an easy $500, all you need to do is unlock the Pop Shocks GobbleGum, once unlocked head over to a vending machine to equip it. Once you equip it, melee the Margwa once to kickstart the effect, then melee it again for a one-hit kill.