A "castle" or tower is built using cards on a table.
The performer seemingly uses remote viewing to correctly count how many cards are face-up or face-down. He may also identify specific suits (e.g., the number of diamonds) or sense exactly when a spectator is focusing on a specific card, naming it without looking. Methodology and Analysis
Despite its complex appearance, the core mechanics are often described as relatively easy and reliable compared to his more suggestion-heavy work.