@mindhallow liked for a starter!
Entreri hated killing the shades.
He hated anything unnatural, thus unpredictable, but he especially hated the way these shadows dissipated in a waft of half-forgotten memory and emotion, the barest wisp of an entire lifetime... So many of them bled loneliness and he was sick of it. Like a smell he couldn't get off his clothes.
He was sick of this damned place.
If his movements in the fight had been particularly brutal to vent his frustrations, that hardly mattered. It had gotten the job done just as efficiently. When the frenzy had finally ended--if any fight could truly be called ended within the Shadowcurse--he found that he and Wish had been separated from the rest of the group, simply two desolate figures among the twisted trees.
He gave a frustrated snarl, and would have slashed his sword at the bark of a nearby tree except the simple muscle-memory of discipline stayed his hand. The muscles in his sword arm tightened, that was all. "Well, get moving," he spat at Wish, taking it all out on his companion. "Those idiots will get themselves lost in no time without us."
There was not a response.
He whirled to face Wish fully, very much in the mood to bully.