|Vertical and horizontal anti-magic garrisons as seen on the Adventure Map.|
Anti-magic garrison is an adventure map object, that can withhold creature troops. An enemy hero can not pass the garrison without fighting the armies inside. It works like normal garrison, but it prevents all spellcasting. A hero who attacks magic garrison can not cast spells in combat.
Also, a hero located on the garrison square can not cast adventure spells, and if the hero is attacked, the battle will take place "inside" the garrison and no spells can be cast in combat. Additionally, spellcaster creatures can not cast spells.
Like garrisons, anti-magic garrisons can be aligned both horizontally and vertically, and are typically used in narrow passes to create obstacle, that can not easily be passed.
Also, it should be noted, that mapmaker can set anti-magic garrison's troops to be impossible to remove. This means, that if a hero transfers creatures to the garrison, they will stay there permanently.