I feel the need to contribute, especially seeing as I REALLY wanna see this
Alignment: -50 (max Evil, these things are said to be the closest thing to pure evil there is)
Backstory: The naagloshii are Navajo demons (I am not Navajo, not Native American at all, but I like mythology, which is how I found their stories, although I'm not exactly sure how accurate they are). Also called skinwalkers, they take a sadistic pleasure in causing pain. They're immortal, semidivine beings, sort of like dark gods, you could say. Most of the skinwalkers are actually humans that learned from the originals, and only the originals carry the name "naagloshii". They're shapeshifters, but the naagloshii in their true forms look like large yellow monkeys with extremely sharp claws. Supernaturally fast and nearly impossible to hurt, much less kill (although it can be done, "immortal" here means they won't die of old age, as such "ageless" might be a better term)
Description: These terrifying demons are masters of disguise. They love nothing more than causing pain, and they are nearly impossible to hurt, let alone kill. If you're unfortunate enough to stumble across a naagloshii, you may as well kill yourself, before the demon does it in the most painful way it can think of....
Stage 1: The naagloshii in it's original form, a large, yellow-furred monkey/yeti creature with long, sharp claws
Stage 2: A large bear-like creature retaining the claws of the first form on all 4 legs, as well as the yellow fur
Stage 3: Copies the opponent's sprite, but retains its own cards
Special cards (only guesses, I have absolutely no idea what the standards for characters at maximum Good or Evil alignment are, these may be far stronger or far weaker, just suggestions for attack/effect types really):
Maul - 8 Shadow energy. Deals 7 damage and cripples the opponent, cutting any physical damage they do on the following turn in half. Does not affect damage from poison or similar effects, or damage from spells.
Ravage - 10 Shadow energy. Deals 9 damage and applies a DoT effect, removing a further 2 life per turn (Bleeding)
Torment - 0 energy of any type. All damage dealt by the naagloshii on this turn is converted into Shadow energy. Only one Torment can be played per turn. Each card that causes damage has it's energy cost increased by 1 the turn this card is played. Does not apply to damage caused by Ravage's DoT. Does apply to damage from Ravage, Maul and Shapechange, and increases their cost by one.
Shapechange - 15 Shadow energy. Deals 12 damage and gives the naagloshii a shield that can block 10 damage. No other cards may be used with Shapechange except Torment cards.
Possession chance: Nearly impossible