The Bastard Axe is a common weapon of the warriors of Vikingheim, a sturdy weapon that can be used with one or two hands, or simply thrown at an enemy
"Come on,, chop chop, I haven't got all day." The last words of Sir Percy Quantril before being beheaded for his attempted coup against Queen Yocasta.
An axe of extraordinary power. There couldn't possibly be anything harmful about it- right?
Draw the party together as debtors to the local lord, king, head of the thieves guild, or mercenary clan, who is forcing them to work together to pay off their debts.