Be under (someone's) spell verb phrase
To be influenced or dominated by someone who enchants or seduces you.
He was under the princess's spell because of her beauty and charm.
Although Kim has broken up with Mark, she’s under his spell again.
As Peter was under her spell, he's determined to get married with her.
a person who is easily deceived or manipulated to do something, especially giving someone money.
Use one's influence and power to support someone
1. To seize or take control of someone, something, or some place with a sudden and fierce attack
2. To gain a rapid and great fame or success in a place, a field or a particular group of people
To be under the control of someone or something
The verb "be" should be conjugated according to its tense.