You create a magical zone that guards against influencing games of chance in a 15-foot-radius sphere centered on a point of your choice within range. Until the spell ends, all attempts to influence games of chance (like the outcome of a coin flip, a roll of dice, drawing of cards and similar) within the zone automatically fail. The exact nature of the failure is up to the DM. For example, loaded dice might produce true random results, cards up your sleeve might vanish, etc. Creatures within the zone are aware of the spell and its effects.

Notes for Review: Based on Zone of Truth, but raised level by one because it doesn't allow saves.