Design an epic scene of colossal Gingerbread Titans marching across a snowy battlefield, led by Santa Claus. Santa rides a massive gingerbread mech crafted from intricately decorated gingerbread with glowing icing veins, gumdrop armor, and candy cane limbs. The mech wields a glowing peppermint hammer and a shield adorned with candy patterns. Render in ultra-detailed 8K, photorealistic, octane render, Unreal Engine-ready, masterpiece, #ChristmasAdventure#