Not my story obviously, but one of my favorites.
http://www.enworld.org/showthread.php?t=102&page=1&pp=40
Wulf's Collected Story Hour -- FINAL UPDATE 12/25
Suddenly there was a piercing cry from the edge of the darkness. Tully had emerged and turned on Alliane, striking her clean through the heart, killing her instantly. Halma had been biding his time, and struck her down with his greatsword, but it was too late for Alliane.
Tully had fallen, but a great deal of the wounds she'd sustained were from Wulf's saps. She was still breathing shallowly. Wulf shouted over to Halma, "Tie her up! Quickly!"
"No!" shouted the halfling. "Kill her! She's a ninja!"
Wulf had been invisibly looting Henwen and Dyson, quickly pulling rings from their fingers and stuffing them in his pockets, but he slowly turned, his mind now at full attention to the halfling.
"How do you know this?" Keldas hovered nearby, also curious.
"She was going to train me."
Halma still wasn't quite sure what was going on. "Rope or sword?"
"Sword!" shouted the halfling. "No wait! Rope... Yeah... Rope! Maybe I can talk my way out of this!"
"Out of what, peck?"
"Well, she passed my name on to her superiors, and said if anything happened to her, they would come looking for me. So you guys may have to fight off some ninja assassins with me."
Once again, Wulf was filled with the urgent need to kill the halfling. He was glad he was invisible, for he was literally shaking with rage. And, perhaps, a bit of anticipation.
But he calmly let the moment pass.
"Well, let's get Tully back to Dyson's tower, right? I'll carry her, just in case she wakes up. Halma, yer can grab Alliane. And somebody should get the head off that demon so we can show the townspeople."
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By the time they reached town, Wulf was visible again, and the people fell back trembling from his angry countenance as he marched into town with Tully draped over his shoulder.
They climbed the stairs to the top of the tower, to Dyson's cramped study. He dumped Tully on the floor.
"Well... here we are. Guess we better wake her up and ask a few questions. I'm not taking any chances though, I'm going to have a potion first." Wulf dug in his pack for a potion.
It was a Ghouls' Touch potion he'd picked up somewhere. He finally found a use for it.
The halfling took the bait. "Got one for me?"
"Sure." Wulf drank his potion and advanced to the halfling with another potion in his other hand. Water Breathing, perhaps, or something equally useless.
As the halfling reached for the potion, Wulf grabbed his wrist. His eyes widened in shock and surprise. "Hey, what are you... Ow...." The ghoul's touch flooded up his arm, threatening to paralyze him.
The halfling fought off the effects and skipped back a step. Wulf advanced. "Wulf, what are you doing?"
"I'm knockin' yer out so we can figure out why yer betrayed us... again."
"What are you talking about?"
"Yer went behind our backs AGAIN, peck, cuttin' deals with the forces of evil."
"I did it for the good of the party! I was trying to make myself useful for you guys!"
"By turning assassin? By studying with evil ninja mercenaries?"
Wulf tried to grapple the halfling, but he wriggled free.
"What, just because Wulf doesn't like me, I'm not allowed to broaden my horizons?"
"I warned yer before." Wulf tried to tackle the halfling again.
"This is silly, I'm just going to fly away."
Wulf laughed. The halfing spoke the command word and his Wings of Flying unfurled to their full twenty-foot wingspan. Or rather, they attempted to: There simply wasn't room for such a large wingspan to fly in the top of Dyson's cramped tower.
"That'll teach yer to buy out o' the bargain bin. Next time invest yer money in a nice pair o' winged boots, jackass."
Wulf opened his hands and his saps unrolled. He started pounding away at the halfling, who tumbled away, trying to defend himself. Halma watched from the top of the stairs. Keldas watched from near the window.
"Fine! I'm not even going to resist, then." The halfling stood still.
Wulf knocked his lights out.
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"Think back. How many times has he stood around watchin' us get pounded on? Watching us die? What about Kellick? And now we've lost Alliane. Yer have to ask yerself-- whose side is he on, anyway?"
Keldas and Halma were unsure. "It doesn't seem right..."
"Yer know, the most dangerous evil is the kind that's right there next to yer. The one yer trust. The one yer travel with. But yer can't go soft now. We should kill him."
Halma disagreed. "No! Take all his things, set him free..."
"So he can come back for vengeance later? I don't think so."
"Then give him to Tully-- for justice."
"So they can train him as a ninja and then he can come back for vengeance? Yeah, we need a pissed-off halfling ninja pr*ck dogging our heels. This is ridiculous. Yer had no trouble killin' Dyson, what's the difference? Evil is evil."
"Maybe he's not evil."
"Well, all the priests within a hundred miles of here are now dead. Awfully convenient if yer ask me. Trust yer instincts, boy, and if yer can't trust them, trust me. He's evil."
Halma turned to go downstairs. "I need some air."
Keldas spoke up. "Let's wake Tully, get her side of the story."
She was still tightly bound, so Wulf brought her around.
"What's yer relationship with the peck?"
"He came to Dyson and I last night..."
"Ach! No wonder he wanted his own room! The little weasel..."
"And I offered to take him in and train him."
"An' what was his part of the bargain?"
"He agreed not to interfere with Dyson's plans at all."
This caught Keldas' interest. "And those plans?"
"Dyson has been turning the animals in the area into humans..."
"He WAS..."
"... in order to raise an army so that he could take control over the whole countryside here."
Keldas blanched. "Well..."
Wulf gave him time to work through it.
"It seems pretty clear to me-- notwithstanding his other transgressions-- that if he agreed not to interfere with Dyson's plans, he was directly aiding an evil enterprise... and..."
"All right, yer talked me into it."
Wulf drew his axe and, in one smooth motion, hacked the halfling's head off.
Taranak exploded into flame again, as if taking pleasure in a deed long overdue.
Halma came running into the room at the sound of the flame burst. "What!? What did you do?"
"We decided what had to be done."
What are yer worried about? Yer left the room-- clear conscience, boy. Did yer do it on purpose, I wonder?
Keldas pointed to Tully. "What about her?"
Wulf spoke first. "I say we let her go. Send her home, no hard feelin's."
Halma shook his head. "If Tamaloc deserved to die, so does she."
"Right." Wulf lopped Tully's head off.
They all sat quietly for a long time. Halma was the first to speak.
"I don't know if I want to travel with you guys anymore."