Lady numbers vs the lawn

A short story: In exchange for free rent, a D&D obsessed girl agrees to do the yardwork of the run-down house she is renting. The Lawn has run wild for two years, and is overgrown into a wild jungle army led by the nefarious Blackberry bush, Rubius. With less than 2 weeks to clear the mess, our narrator goes to work, using her hard-won D&D wisdom to vanquish her awful foe.