(Infernals look like this:
)
Orion is horrified to note that the Infernal is already through the gate. He watches as Sylph in a moment of panic fires a arrow at the demon.
No, you fool that won't hurt it, he thinks. As he thought the arrow only does superficial damage at best. Sylph walks over to him and asks if they should run or fight. When she does this it snaps him back to the moment. He quickly undoes his robe revealing this black shirt and pants underneath. As he does this he notes that the others in the party are taking cover in the underbrush. The Infernal lets out a unearthly roar and calls out, "Where is the caster of the magic that called me here? Know I will find you." Orion grabs Sylph's around her shoulders and trips her. After gently setting her on the ground, he covers the two of them with his robe. Putting all his weight on her he whispers, "make no sound, and do not move, and absolutely NO magic. We must wait for the monster to move on before we can do anything now."
With another roar the Infernal begins to move to the south. Orion realizes it will pass right by himself and Sylph. He prays Sylph will have the sense to follow as he has instructed her.