That BBG was hitting like a beast, I took close to 60 points of damage in three rounds from him. He ate through my Armor of Agathys with one of his two attacks each round making me cast it again on the next round, and a quick Healing Word from the cleric bought us enough time. Te whole adventure was exciting and tense. Lots of fun.
P.S. Looking forward to the next mission. I can't wait to use that Katana as my pact weapon...mwhuahahahah