Originally posted by Faceplant8:

With a sword, I kill the abomination by parrying it and then jabbing it with the secondary attract.

Iron axe takes about 12 hits.
Black metal axe takes like five.

Originally posted by Faceplant8:

I also tried killing an abomination with an axe, with very mixed success. The problem was that I couldn't hit it.

The big trick to the abomination is watching the two front legs.
If it is attacking with the right leg then attacking the right leg is difficult.
If you stand in the right spot the right leg misses and the left leg is wide open.
Also if you can hit the main body it does far more damage.

Sometimes just hide behind your shield and wait for the opportunity makes a difference.