green Barrier in Heroes 2

Maps that place it

• Arrow's Flight
• The Abyss
• Corruption's Heart
• The Elven Lands
• Fount of Wizardry
• Colossal Cavern×10
• Dungeon Below
• Family Reunion
• Great War II
• Guardian War
• Ghost Planet 1.1×4
• Last Hope
• Leopoldville
• Pirate Utopia
• Quadruplets×3
• Roc 'Round the .×3
• Surf and Turf
• Threedom×3
• THUNK×2
• Valley of Death
• Wizard's Land 3