A magical thruster, designed by the brilliant Grikkle Gribgrub, that can be attached to the head of a bludgeoning weapon. When making an attack you can choose to invoke the explosive force of the thruster. When attacking this way, the attack roll has disadvantage, but deals an additional 1d10 of force damage. 

After attacking in this way 25 times, you no longer have disadvantage on attack rolls made with the thruster. 

You can install and/or uninstall the thruster onto a different weapon on a short rest. When switching the thruster to a new weapon, if you have already done your 25 attacks, make a strength check DC15. On a failure, 12 additional attacks must be made to hone your swing and be rid of disadvantage. On a success, your previous training carries over, and you do not have disadvantage.