They then reported her for having summoned a demon into the body of their daughter.

Which means that someone wants you out of the picture so badly they're willing to summon demons.

Draw me one of them pentagon things and summon a demon.

"I'll summon a demon if I have to, to help persuade him."

They could have summoned and bound demons into it.

And that might not even be necessary, if a spell cast from up mere could summon demons to down here.

We did summon demons to do terrible things, often to people who were innocent of wrongdoing.

He could also summon demons from an unknown dimension to do his bidding.

He is young - not yet sixty, and still has the strength to summon demons to his bidding.

To demonstrate the value of control, I will now summon forth a demon, a being from another world.