Boulder-Slugger

When wielding a club, or great club, or any melee weapon that resembles a club and deals bludgeoning damage,  you can take a rock and bat it with your club, sending it off like a base-ball. The attack's stats are as follows: The rock's to hit modifier is your strength modifier, and it's damage is 1d6+ your strength modifier. However, if you are wielding a heavy club, or something of that sort, you can use this fit to base-ball a large rock, and it's damage dice becomes a 1d8 instead of a 1d6. (You may also modify the rock to your liking for your own flavored effects, making it spikey for piecing, bladed for slashing, perhaps covered in poison, what ever you like.)