Hovering before the gate, he studied the lines of magic crisscrossing its surface. The lines not only prevented physical passage, their pattern formed two magical symbols that would kill anyone whose flesh touched the doors without first speaking the password, having the appropriate item on their person, or the right blood in their veins. A further analysis with one of his wands showed Gromph that the symbols were permanent. They did not vanish upon a single discharge. Instead, they would continue to reset and kill unless they were eliminated.
He spoke the words to a counterspell and focused the magic of the spell into his forefinger.
Gently, he ran his shadowy fingertip over the lines of the first symbol. Though his finger was incorporeal, the magic reached into the physical world. Where his finger touched, his spell erased the symbol. Soon, it was effaced.
Gromph cast another counterspell and repeated the process with the second symbol. It proved more stubborn than the first. Gromph's magic met the magic of the symbol and did nothing. His counterspell had no effect. Biting back his frustration, he prepared another spell, a more powerful, focused version of the counter.
Sudden motion from above drew his eye. A swarm of crossbow bolts rained down at something behind him. Gromph turned to see a half-score of giant trolls charging across the bridge. They wore piecemeal armor strapped haphazardly to their gray-green, warty hides. The smallest stood three times as tall as Gromph, with over-long limbs, a mouthful of fangs, finger length claws, and rippling muscles. In their huge hands, the giant trolls held a mammoth stalagmite, shaped by magic into a fearsome battering ram. Gromph's magic-detecting vision told him that the ram had been powerfully enspelled.
Green disks of magical energy hovered over the huge creatures-cast by distant Xorlarrin wizards-protecting the trolls from the rain of bolts that poured from the walls. In ten strides, the giant trolls had crossed half the bridge.
From the Xorlarrin lines behind them, a platoon of orog crossbow-men and their shield bearers ran up to the edge of the moat-chasm and fired a volley of arrows at the defenders on the wall. An answering volley streaked down at them. Fire and lightning fired from Dyrr wands exploded in the midst of the orogs, and several of the bestial creatures burst into flames or exploded into pieces.
Drow soldiers stood lined and ready fifty paces behind the orogs, ready to charge forward should the giant trolls penetrate the doors.
The huge creatures lumbered forward, the bridge vibrating under their weight. Fire exploded in their midst but did not divert their charge.
A wall of conjured ice, taller than the giant trolls and an arm's span thick, formed before the creatures, blocking their rush across the bridge. They did not even slow. In stride, they swung the magical stalagmite ram into the wall, and the ice exploded in a blast of shards. They charged onward.
Cursing, Gromph started to fly upward. Though incorporeal, magical energies could still harm him, as could appropriately enchanted weapons. He did not want to get caught in any crossfire.
A cloud of vapor-poisonous vapor, Gromph assumed-formed before the doors. The giant trolls gulped clean air and charged in, swinging the huge ram as they did-right at Gromph.
He dodged aside but his incorporeal flight was cumbersome and slow. The magical ram clipped his shoulder, and its enchantments reached through realities to affect his insubstantial body. Agony exploded in his brain. The impact spun him in a circle and knocked him toward the gate and the killing symbol.
He struggled to right himself and contorted his body to avoid contact with the magically charged gates. Gromph regained control a heartbeat before careening into the gate, and he flew upward and off to the side of the bridge, hovering over the moat chasm. His entire right side flared with pain, but his ring began immediately to repair the wound.
Still holding their breath, the giant trolls reared the ram back and slammed it again into the doors. Sparks flew from its tip, flecks of stone showered the bridge, but the adamantine doors showed not even a scratch. More and more crossbow bolts poured down on the trolls, some getting through the magical shields and finding flesh. One of the creatures, struck in the cheek by a bolt, exclaimed in pain and inadvertently drew a breath of poisonous air. He fell writhing to the bridge and was dead in moments.
The rest continued on, futilely battering the gates as bolts poured down. Gromph found the scene surreal. He could hear nothing, smell nothing. He felt as if he was looking at the imperfect illusion of a first year apprentice.
Gromph assumed the giant troll assault to be only a feint, with the real attack occurring elsewhere, but he had no way to confirm his guess. Apparently, he had been mistaken about