Pillar

Columns are large, indestructible pillars found in Super Mario World. These obstacles appear mostly in fortresses, towers, and castles, usually hidden in the floor, ceiling, or also in walls. They move slowly for some seconds, revealing themselves, before suddenly smashing almost anything on their way. After some seconds later, Columns move slowly back.

Trivia

 * Smithy uses a special attack, the Sledge, which lets fall a Column over his target.