Wan 2.5 Preview Prompt: A colossal dragon slumbers deep within his cavernous lair, his obsidian scales shimmering with an eerie inner glow like molten lava beneath cracked stone. Massive wings, veined with phosphorescent blue, are folded against his scarred flanks, while his spiked tail curls protectively around mountains of gold and ancient artifacts—swords of forgotten kings still lodged between his claws.