Devoted Wyrm

A projection of a magical wyrm spirals around you. The projection has 2d6 hitpoints and has immunity to psychic damage. The projection disappears when it drops to 0 hit points or when the spell ends. With a bonus action, you can send the wyrm to attack a creature in a range of 50 feet and lose 1d6 of its hitpoints. When the wyrm attacks, it deals an amount of  force damage equal to a doubled amount of hitpoints it lost. After the attack, the wyrm comes back to the summoner.

If the projection disappears, you gain temporary hitpoints equal to half the wyrm's hitpoints rounded down.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the wyrm's hitpoints increase by 1d6 for each slot level above 2nd.