Cubic Vision (3.5e Flaw)
From D&D Wiki
Cubic Vision [General]
Your character's world is made of cubes, round things disturb him/her
Prerequisite: Cannot be Blind
Effect: If you see a circle or a sphere, you are stunned. The condition lasts until the sphere is no longer in sight.
Special: The sun does not trigger this flaw unless it is dusk or dawn and its shape is clearly visible. Similarly, the moon does not trigger this unless it is a full moon.
Roleplaying Ideas: Do everything you do using cubes. Build using cubes. Only walk in the cardinal directions in respect for the cubes.