Rune of the Ancients (Open Roleplay)

(OOC: This is my first Roleplay on this forum so lets give it a whirl, This is my Character Profile:
Name: Derotkza (Dero)
Gender: Male
Age: Unknown
Race: Half Dragon, Half Demon
Height: 6' 8"
Features: Dragon like head, muscular human style build and dragon like wings.
Personality: Arrogant and self important, prefers to work alone.
Weapon: Custom forged blade that resembles a dragon tooth, it is serrated.
Abilities: Very good eyesight, good hearing, quite strong and can breathe fire.
Disadvantages: Has no sense of taste, no emotions and has difficulty speaking.

It takes place in and around a huge Dwarf stronghold, set deep in a mountain, Derotzka has shot ahead of the group he was with to attack a group of Dwarves carrying some sort of box.
OOC: rune-the-ancients-ooc-t16606.html)

Derotzka smelt the fear of the dwarves as he bounded up to them. He then opened his eyes to enjoy their frantic scrabble to get their weapons and their petrified facial expressions. He flickered his tongue and pulled his blade from its scabbard, brandishing it as he moved. One of the dwarves let out a cry and a rain of crossbow bolts flew from the mountainside. Derotzka opened his wings to avoid being impaled, but one lucky bolt managed to go through the gap and hit him square at the top of Derotzka's spine. Enraged, he put on an extra burst of speed. The dwarves pulled their shields up, ready for impact. He was upon them now, the sword cutting through their heavy dwarven armour like a knife through butter. They didn't stand a chance. The dwarves on the mountain side let loose a second round of bolts. Thinking fast Derotzka picked up a dwarf and used him as a shield. The dwarf screamed in agony as the bolts penetrated his flesh and left Derotzka blood splattered. He had just about had it with those crossbows and opened his maw. The dwarves were confused at first but then realized that it was too late. An inferno erupted from Derotzka's mouth and burnt the dwarves alive. He turned to face a lone dwarf, much more heavily armoured than the rest.
"You shall not take this box, creature!" Bellowed the dwarf.
"We...Shall...See." said Derotzka dryly. He pulled the blade above his head and let out a roar that could shake even the sturdiest men. The dwarf stood strong and responded by lifting his axe above his head. The two brought down their weapons at the same time. A few seconds past and the dwarf fell to the floor in two pieces, Derotzka suffered a long cut from his right shoulder to his left thigh, but not enough to kill him, he pulled the crossbow bolt out of his back and threw it at the corpse. He then stepped over to the box and opened it slowly; the hinges creaked as he did so. A thin smile spread across his dragon like face as he produced a necklace with a dwarven rune attached to it. Just then he could hear footsteps from behind him, the group. He turned around to see them walking toward him.

ummm dude.... you never posted necessary character sheets or rules. and besides you need an OOC as well...

OOC :
Name: Grishnak "Godkilla" (Grish)
Gender: Male
Age: No records exist but the first sightings of Grishnak Reportedly date back over 200 years ago
Race: Chaos Orc
Height: 5'11" (When hunched)
Features: Dark Green, almost black skin. Blood stained armour. Muscular build, arms strong enough to rip a man limb from limb.
Personality: Bold, Impulsive, Cruel, Conceited, Loyal, Vengeful
Weapon: Massive 2 handed Axe aswell as 2 smaller axes
Abilities: Extremely strong and skilled with all types of close combat weaponry, skilled tactician, feared leader
Disadvantages: Has a tendency to act on impulse often leading himself aswell as his comrades into potentially fatal situations

As the Dwarven Defence force lay smouldering in front of the stronghold gates, Derotzka was halted from advancing any further by the rest of his group, who while praising his combat prowess also took note of his foolhardiness, but they were not the only ones with an interest in the old Dwarven Stronghold. Unbeknownst to them, Grishnak "Godkilla" the most infamous of chaos orcs ever to ravage the world is also here working his way towards his own hdden agenda. Grish once heard from an old prophet that an ancient dwarven battleaxe "Gitsnik" lay within the deepest vaults of the last remaning Stronghold of the dwarves, ths axe was rumoured to enhance the welders own abilities sevenfold. So without further delay Grish made his way inside through an opening in the roof he had produced with his mighty War axe, the loud clank of his blood stained armour alerting all inside to his presence, but it mattered not, for Grishnak relished the challenge, raising his Axe in challenge he let out a mighty bellow "Come on yer stuntys, I dont care how many of you there are give me a hundred, even a thousand and ill still kill you all the same"...

Derotzka's thin smile had vanished at the orc's entrance. He turned to Rathor, but Rathor was standing frozen to the spot. Derotzka growled and jumped into the improvised hole that the Orc had made. He saw the orc massively dominating the dwarves attempting to push him back out of the stronghold, lucky the orc had not noticed Derotzka use his hole. He hung the rune around his neck and closed his eyes. The orc was now half way through a group of about 50 dwarves, and still more came from the deep tunnels. Derotzka then opened his eyes suddenly and punched the wall revealing a secret cavern. He launched him self down the tunnel without thinking and landed right in the dwarf armoury. As he looked around, Rathor had come flying down the tunnel behind him and landed on the stone floor. Derotzka glared at Rathor as he stood up.
"S...sorry" whispered the little rat man. Derotzka opened a door on the other side of the room, and as he did so several dwarves flooded into the room and they were surrounded. Derotzka growled at them and bared his fangs. The rune glowed brightly and Derotzka became invisible. Confused the dwarfs began attacking the air. One by one, each dwarf fell as if nothing had hit them, but nothing was enough to kill them. Derotzka took the rune off and threw it at the wall, destroying it. Rathor knocked over the weapon rack he was hiding behind. Derotzka froze him with a fearsome stare and then walked through the door, leaving Rathor in the armoury. The sounds of battle continued from the tunnel, presumably the orc taking on yet more dwarves. Rathor called down the hall, "I'll wait here for the rest of the group!"