I love having multiple suggestions to work with.
Ideas flit through your mind quickly, and you take only a second to reach a decision. These invaders must die.
You jump from the cap, raise your spear above your head with both arms, and bring it down with all of your strength. The spear is about six or seven feet long, and your hands were about midway from the base to the tip. Still, your attack buries the weapon through the goblin's skull until your hands make a wet slap against its bloody scalp. The kill is quick, and the poor sap doesn't even make a sound. The other goblin, however, notices you.
You jerk the spear out of the body, raise your shield, and prepare for actual combat.
You dodge several swings of his sword, and block others with your shield. You try a few thrusts with your own weapon, but you just don't have the speed necessary to do much. Even though you only saw the two goblins while on the treeshroom, you feel others nearby.
Suddenly, you wonder if you can cause harm to your opponent without using your weapon. You jump back and focus your mind. You imagine the goblin's aura draining away, and concentrate on making it happen.
It works, slightly, and the goblin stumbles suddenly. Something about this situation starts filling you with rage, so you decide to forcefully blacken its aura. You force away all of its health, all of its vitality, all of its life. You emit great, booming laughter and start squelching the auras of all of the goblins in your immediate vicinity. The red haze at the edges of your vision fades, and you feel exhausted.
You stop for a moment when something without an aura walks close enough to be seen. It's a dwarf, covered in steel plate and wielding an axe. He lifts his helmet and looks around. You do too, and see that there are seven goblin corpses within the lamplight. He regards you with an expression of fear, then lowers his helm, turns, and walks back toward the fort while waving for you to follow.