Blurriness or Lack of Detail: Ensure that the concept art is highly detailed and clear, avoiding any blurriness that may obscure the fine mechanical intricacies of Sentinel's design.

Bad Color Choices: Avoid using colors that clash or appear unnatural, ensuring that the color palette enhances Sentinel's formidable and noble appearance.

Ugly or Incoherent Design Aesthetic: Refrain from including any design elements that might disrupt the seamless integration of strength, elegance, and wisdom in Sentinel's appearance.

Unwanted Accessories or Objects: Exclude any unnecessary or distracting accessories or objects that do not align with Sentinel's character and purpose as a protector of the innocent.

Poor Representation of Weapons: Ensure that the energon blade and plasma blaster are accurately depicted and visually impressive, conveying their significance as formidable weapons.

Inaccurate or Unnatural Pose: Avoid portraying Sentinel in a pose that appears awkward or unnatural, ensurin