|Probability of occurrence (%):
AI cannot cast this spell.
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It might seem unassuming at first, but a hero that knows this spell camping out enemy shipyards or towns with shipyards built can force enemy players to ration their resources rather than wasting them on new boats that just get immediately scuttled. Also handy for cutting off an enemy hero's escape route (assuming they can't use Water Walk, Fly or possess the artifacts that grant either effects).