Originally posted by M.Red:

getting a troll to fight an abomination is also very satisfying
only needed two attempts to get them into fighting each other

This was my first encounter with an abomination. During day, I had heared some strange walking sounds, and I first thought that the nearby club troll was stepping on its spot (a little bug then). I climb up in a tower near the swamps and the troll to shelter for the night (no fire). I believe that some night spawn made the two closing and meeting each other. From my point of view, I could see and hear the fight between the two shadows in the dark. The abomination prevailed. Next morning, I could see the thing, and stealthy take the spoils of the fight (some greydwarves, the troll, and a tree).