A full character turnaround sheet of an ancient forest spirit guardian, massive sentient tree-creature with gnarled bark armor resembling weathered knight's plate, glowing cyan rune tattoos spiraling around twisted branches like veins of light, hollow eyes radiating soft emerald wisdom, massive wooden limbs ending in clawed root-hands clutching a broken crown of wilted flowers, moss and wildflowers growing from shoulders, dramatic moonlit backlighting creating ethereal silhouette, deep forest green weathered bronze and phosphorescent cyan color palette, Painterly digital art style, concept art for video game, front and back view with nature magic details