blue Barrier in Heroes 2

Maps that place it

• The Abyss
• Betrayal's End
• Corruption's Heart
• Conquer and Unify
• The Wayward Son
• The Southern War
• The Elven Lands
• The Epic Battle
• The Eternal Scrolls
• Fount of Wizardry
• Pirate Isles×2
• Blood is Thicker×2
• Colossal Cavern×3
• Family Reunion
• Great War II
• Ghost Planet 1.1×2
• Leopoldville
• Ludicrosity×3
• Pirate Utopia
• Plains of Aekon
• Quadruplets×3
• Roc 'Round the .×2
• Surf and Turf×2
• Terrain Wars×2
• Threedom×3
• THUNK×4
• Witch Hunt
• Wizard's Land 3