Looking for character’s weapon idea

I have a character that is a little different to my usual play, and wanted to ask for ideas as to what type of weapons they play best with. They are effectively a cleric/warlock multi class (it’s a long story, don’t ask) great one and trickery subclass with pact of the tome. I’d prefer for their weapon to look a little imposing (something like a halberd/staff), but if there’s a better fit my DM made it clear we can just reskin something to make it make sense to the character.