Antonyms for the phrase "most mind bending" would include terms such as simplistic, straightforward, uncomplicated, clear, and plain. These antonyms suggest the idea of clarity of thought and simplicity in understanding, which stand in stark contrast to the idea of a concept or idea that is so complex that it strains the limits of one's comprehension. Other antonyms for "most mind bending" could include concepts like mundane, dull, unexciting, unchallenging, and uneventful. These ideas connote a sense of sameness and predictability, which is decidedly different from the concept of something that is awe-inspiring and challenging to one's understanding.