After the death of Ix Warpshadow, the Flayer's most talented member, Grey Seer Farsark immediately began grooming a new lead scorer. To this end he began to spike gutter runner Darkspitter's food and drink with various warpstone concoctions, hoping to elicit some positive mutation. This insane scheme met with surprising success. Darkspitter may not have the skill of his predecessor, but his freakishly long legs give him speed and jumping range that remind the Grey Seer of his star pupil, bringing a tear of nostalgic rage to his eye.

Renamed after a tunnel collapse that smashed the left side of his face, former-overseer Grath turned to Blood Bowl as a slightly less dangerous profession than working the mining crews in Foul Peak. Ever since fellow lineman Frizbik experienced his deforming mutation, Half-faced Grath has always noted in interviews that he is the /second/ ugliest player on the Flayers.

His beginnings as a clanrat in Clan Rigen's reserve armies promised Knottail a life of boredom and an early death at the hands of his own bored masters. Then, one day, his Clawleader took the regiment to one of the Clan's subterranean stadiums, and during routine a pitch invasion over the result of a coin toss the coach of the team noted he had a natural talent for beating the ever living snot out of people with his bare fists. Unfortunately, that team and all its players were killed in a cave in caused by a particularly vehement hail mary pass. The coach, being the sole survivor, was selfless enough to inform Grey Seer Farsark of his discovery, shortly before being turned into a set of fur curtains by an underlord of Clan Rigens. The Grey Seer is cautiously enthusiastic about this acquisition, and Knottail's success in the league so far. "He is hard to kill-kill," Farsark states, before glancing at a jezzail mounted on his wall.

Massive and brutal even by the standards of Storm Vermin, the Black Thresher's gained his name in the Battle of Three Bridges, a clash between Clan Mors and the Dwarves over a longbeard holdout in the fallen City of Pillars. During the battle he used his bare claws and paws to hurl dwarf after dwarf to a terrible demise from one of the high, thin bridges that gave the battle its name, and in doing so caught the eye of the Clan Rigens chieftan, who doubled as a talent scout. Someone who could do that much damage without weapons was obviously prime blood bowl material, and it wasn't long before the huge black furred Skaven had signed a contract with his new moniker: The Black Thresher. Under Grey Seer Farsark, the Thresher's potential seems to have been unlocked; the Storm Vermin has caused more casualties for his team than any other single player, including the Rat Ogre Shatterfang.