Forest Dweller

You shout 'Wait!' They cease their firing and you feel the last of the stones power fade, then replenish itself again. You've given it time to bring the barrier back up at full strength, not a moment too soon. But if they fire again, it will fall. Even great relics have their limits. You need to convince them to leave.
"Who are you?" A gruff, large man says- more a command than a question.