After days trudging through massive old knights and the surprisingly quick Heide Knights I finally reached the cathedral to challenge the Old Dragonslayer, and of course die repeatedly.
To reach this boss you will need to make your way to the cathedral and kill the dragon guarding the lever to drop the draw bridge.
Once inside the cathedral be ready because this boss is fast and can break through everything in the environment. Hiding behind the columns doesn't provide cover as this guy can smash right through them, and kill you. Trust me on this, he killed me a few times breaking through columns. To defeat him i used my halberd with a coating of Aromatic ooze on it. Continue reading at at Couch Jockey Gaming