Mysterious Person
The barrier looks to be strengthened, not to be stronger but to last longer and with less effort on the mysterious mage's effort.
The mysterious man looks at the other man and says with a voice that is almost alien to your human ears,
"They don't have it. You don't have it. Restraining me to this field is pointless. Drop it so I can find where it is."
The other man replies, a sense of worry in his voice,
"No! You don't need whatever it is! Stop this and I'll help you!"
The mysterious man seems disappointed.
"Drop the trap or i kill this man here." his eye starts to glow green again as he looks at Seth who is regaining his strength.
OOC:
What do Seth and Margaret do? They can try and convince the man to drop the barrier, or they can fight the monster and drive it away, or anything else you think of.