Planar Seal is an Uncommon Global Enchantment belonging to the File:Icon Life.png realm. For File:Icon Mana.png it may be cast on the overland map to create a magical seal separating the two Planes, so that units may not cross between them in almost any way. Towers of Wizardry have no effect, nor do spells like Planar Travel, Astral Gate and so on. The spell has an Upkeep Cost of File:Icon Mana.png per turn.