Location: the land between Amegakure and Hoshigakure in a cave surrounded by bones of the dead these cats wait.
Nindo: they only want to be strong and thus be commanded by someone stronger than they.
Conditions: the person must track down the current holder of this summon which would be Raitou Shinteki and either kill him or convince him to bind them with a summoning contract which is a long paw shaped tattoo on the users forearm.
Apearance: these cougers come in many different sizes and classes but most do not have chakra. the only couger summons to have chakra are the boss summons which all need a sacrifice to summon and no not the cutting of your thumb you need either a small animal or a live human being for it to willingly fight for you. most cougers do wear simple light weight armor for protective measures.