Funny enough, while i was working my way to this area, i encountered an Abomination. I tried to goad it to the Black forest area ahead towards a troll but to no avail. I ended up just running onwards. Hilariously, as i reached the swamps, a troll and an Abomination were in the midst of fighting(absolutely no way it could've been the same two).

I watched and then participated, taking he troll's side, then finished off the troll. It was crazy and bizarre seeing the very scenario that i failed to orchestrate actually play out moments later out of nowhere.