"Arcane and necromantic powers try to obfuscate their trail. Much stronger than the last time I encountered them. Stronger than they should be," Malchor said without opening his eyes amidst the sweat which ran down his brow.
"There..."
The surface of the quicksilver became a mirror at first, reflected your faces, then became a window onto a dense forest which showed signs of a legion having moved through it. Trees uprooted or felled for wood, fire pits, animal carcasses, and foul pools of water. A small fort patrolled by giant trolls sat at the edge of that decimated forest, its now one-handed orc commander shouted in his native tongue at his underlings and the handful of human mages atop the 20 foot high walls.
[ +- ] orc speak
"Reinforcements will arrive within the hour! We hold the prisoners here until they arrive to take the humans through the mountain pass!"
Commander One Hand moved into the fort proper, little more than a series of bare stone rooms, and your invisible scrying sensor followed. His prisoners, your friends, lay bound and gagged on the dirty floor, and he growled at the handful of human mages and orc guards near them.
[ +- ] orc speak
"Do not touch them or speak to them! We follow orders! We are loyal!"
Commander One Hand seemed overly circumspect for an orc, almost as though he knew he was being...
"Let me try an observational variation," Malchor said as his visibly trembling fingers danced in the air.
In the corner of the fort's room, you saw a luminous orb about the size of your fist floating near the ceiling. Almost as soon as you saw it, the orb flashed and violent ripples danced through the quicksilver, breaking the connection.
"Another scrying!" Malchor shouted.
"No doubt one of the Malevolent spellcasters!"
He tried to stand but slumped back to the floor.
"I had a long day in the lab before helping the Vistani and twisting this spell. This is taxing me more than I'd expected," the wizard said in the defensive tone of one unaccustomed to being seen at less than his best,
"but I can teleport you to them using the bastard's hand as an anchor. They're somewhere on this plane... I'm not sure exactly where... but you can teleport back here easily enough, Presto."
He looked up at you all and asked,
"Whoever was scrying them saw our sensor, too. They'll know you're coming. Are you ready for a fight?"