1) things can still sneak around them in pitch darkness - dark vision still has a -5 penalty to passive perception in no light. Use this to your advantage. 2) you cannot see colors in complete dark. Design a puzzle around color matching, make them cast dancing lights and attract whatever’s lurking in the shadows 3) have larger battle maps and remove creatures beyond their DV range

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4) if things are SUPER dire, use magical darkness. It doesn’t have to come from a spell, it can just be a property of the dungeon

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Use a gorgon in the dark so that the party is suddenly relying on the people who don’t have darkvision

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6. Do sound puzzles

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Magical darkness homie

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