@zuvuyeay
Probably what hit you was the tongue of the Adjudicator. You have to instantly go to the ground level, or else he'll pound you from up there.
Once you're in ground level, keep hitting his weakspot (the large gash on his left side) and dodge his extremely slow sword swipe attack. Once he falls down to his knees, pound away at his head.
To me, the hardest of the 1's was Armored Spider, the first time I fought it, mainly because I had no ideia that there was a good Fire Resistant shield as the Purple Flame Shield xD
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