Hollow Knight x HH
Nightmare Alastor

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Hazbin Hotel x Hollow Knight
Nightmare Alastor is a mix of these two series, he may seem cheery but is much more sinister. He loves to watch people suffer and has a hatred for happy things.
Abilities: He can heal himself, control shadows into flying towards things and burning foes in its path, has a force that can destroy foes or break through fragile structures, his mask/face can open and it reveals a black face with sharp teeth and a 'x' on his forehead, he can also grab people with his shadows and mercilessly strangles them.
Personal things about him: He has a permanent smile that never goes away, his shadow antlers grow and can become sharp, he's extremely tall like 7'5, he likes cats but hates dogs, has a weird interest for spiders, likes puppet shows.