Brainteasers

The Brainteasers are a group of aliens who resemble hats. Originally from the planet Fez, they are criminals bent on conquest of the universe.

Powers and abilities
The Brainteasers use their suction tendrils to attach themselves to the head of a potential host. Once attached, they control the victim's every action. The host also gains incredible strength, and whenever they speak, it's always the Brainteasers speaking through them. The Brainteasers' diet consists of metal, which which they force the host to eat.

Weaknesses
If the host has their head coated in a slippery substance, such as shampoo or hair gel, the Brainteasers will be unable to get a firm grip with their tendrils. The Brainteasers can also lose control of their host if the host sneezes.