Some spells, such as the Snake Bite (Snake Magic), give you a chance of Poisoning a monster. 


To complete a “defeat X Poisoned monsters" challenge, you must kill the monster WHILE it is still Poisoned. Do this X times to complete the challenge!


Note: You can Poison any monster of your choice. However, if the monster is no longer Poisoned when defeated, then it won’t count toward the challenge.

Learn more about: How do I Poison a monster?