Hypnotism and Psychological Manipulation

Mabuse's ability to exert mind control over victims—forcing Hull to lose at cards, compelling Count Told to cheat, and dominating the Countess—illustrates the theme of psychological coercion and the fragility of human will.

Hull feels an unseen force controlling his actions, and the stranger's dominating gaze suggests hypnotic influence.

The Professor uses hypnotic suggestion to influence Wenk's decisions at the card table, attempting to compel him to take a card against his will.

Mabuse's skill in hypnotism is introduced as a tool for treating patients and is implied in his ability to captivate others, including the Countess.

Mabuse's attempt to hypnotize the medium and his psychological domination over the Countess highlight the theme.