A simple chisel.  I designed, printed, and used this when cosplaying Chetney Pock O'Pea (Critical Role Season 3), although there is nothing specific to the character.  The split files should print diagonally on most printers in a single print.  Print the two halves with the flat face down and oriented diagonally, adding two connector pieces.  A bit of black hockey stick tape on the handle and Rub N' Buff on the blade, and it should be ready to go.