Forum:Slaying Monster Achievements

Under ‘Trophies’, you can earn Favour Points and Skill Points for slaying monsters multiple times. For example, there is an achievement that states when you slay 5 dragons you obtain 1 FP and 1 SP.

What I want to know is what constitutes a ‘slay’? Reason I ask is I have joined in battles (and defeated) far more than 5 dragons, and yet I haven’t obtained this achievement yet? Do you have to be the one that summons the monster or is it based upon a minimum number of points you earn by attacking?