Eclipse

You cause the Moon to cross in front of the Sun for a few minutes. In 1d4 rounds the world the becomes encased in dim light. Once this happens, your shadow animates and is controlled by you acting on your turn and taking the statistics of a Shadow but with half your hit points and any weapon attacks you have, it has but they do Necrotic damage. If it dies then on the beginning of  your next turn, it reanimates.