Terrain Effect Magic is an unnamed Caster Magic that involves the manipulation of natural phenomena in a specific area.
It is a Magic which allows the user to manipulate the terrain of a specific area and give it different effects. The effect given may vary from causing the ground to crumble to manipulating the area's gravity. The user could even summon a mass of water and flood the entire area. In addition, Arcadios stated that this Magic, along with all of the others that the Garou Knights employ, was specifically designed in order to kill people.
- Fairy Tail Manga: Chapter 307, Pages 15-16
- Fairy Tail Manga: Chapter 309, Pages 9-11
- Fairy Tail Manga: Chapter 310, Page 7
- Fairy Tail Manga: Chapter 308, Page 3