Starclan
"I am Lionheart. I was a ThunderClan warrior. In a fierce battle, I died defending my Clan. Now I belong to StarClan, a Clan of the spirits of our warrior ancestors. Yes, you are dreaming. We often walk in the dreams of those we watch. Don't be afraid. I know it looks like a land of mist and shadow, but I promise there is enough light to warm the darkest of hearts. From here, we watch over the Clans we have left behind."— Lionheart on StarClan in Secrets of the Clans, page 72