Lionclaw

Lionclaw was a ThunderClan warrior and the mastermind behind the War of the Clans. He created DarkClan, hoping to bring all four Clans under his leadership. He was the short-lived mate of Emberfoot and the father of Brokenstar, as well as the brother of Lightclaw. He was described as a long-furred, pale golden tom with handsome amber eyes.

Lionclaw was born to the she-cat Fernheart, along with his brother Lightclaw. He was mentored by Redstar, and was mentor to Emberfoot, who eventually became his mate. Inherintely cold-hearted and self-absorbed, Lionclaw began to plot the destruction of the four Clans while he was still an apprentice, believing that he were the destined leader of all of the cats by the lake. He began to consult with a Dark Forest tom, Stonetooth, an old ShadowClan tom from many, many generations before, hoping to gather support for his idea. He began to walk in the dreams of cats from other Clans, including Shellstar of RiverClan, Briarstar (then Briarclaw) of ShadowClan, and Heavytail and Beechflower of WindClan. He designed special meetings for his supporters in the Place of No Stars. Eventually, he garnered enough support to tackle the four Clans. He was successful, and the four Clans were converged into one, which he called DarkClan. He made himself leader, calling himself Lionstar despite StarClan's refusal to grant him his nine lives. He also moved the Clan's territory to the island in the middle of the lake, hoping to keep all of the Clan cats in one area, where he and his spies could keep an eye on them.

Lionclaw's plans were short-lived; Tallheart and supporters overthrew the DarkClan supporters, and Lionclaw met his death at the claws of Tallheart.

Lionclaw was seen in the Place of No Stars alongside Stonetooth and Shellstar. He claimed that more cats were to follow in his footsteps, including Briarstar and Weaselfur.