A colossal dragon's lair nestled within a massive dormant volcano, enormous scales draping over mountains of glittering gold coins and ancient gemstone treasures, massive ruby and emerald jewels scattered among burnt copper armor piles, glowing molten lava rivers carving through obsidian rock far below, warm fiery orange and amber light illuminating dragon wings unfurled across cavern ceiling, tiny armored knights' skeletal remains tangled in gold chains, deep crimson and molten gold color palette with cool obsidian shadow accents, fierce powerful mood, dramatic triangular composition with dragon head dominating treasure hoard, epic cinematic Lord of the Rings scale, hyper-detailed matte painting, 8K fantasy art