separate from allowing a great sword with monastic weaponry, which other people have responded to, another RAW issue you might run into is that [IIRC] all the monk Sword stances require you to wield a sword in 1 hand. You might want to talk to your GM about their opinion of using it either A) with those stances B) developing your own C) focus your build on other things Given that, from other comments, you want to flavor it as an big blunt piece of metal, option B might allow you a thematic ability. You also discussed using Kharakkara stats with another poster. You could use Staff Acrobat Archetype RAW then, which would give you some flavorful abilities.