Create a high-resolution 3D character asset of an undead lich designed for an MMORPG game. The character should be posed in a perfect T-pose (arms extended horizontally, legs straight) to showcase full rigging and anatomical details. Render the lich as a decaying, skeletal figure draped in tattered robes adorned with arcane runes and mystical symbols. Include eerie glowing eyes, hints of rot and mystical energy emanating around its form, and a dark, atmospheric aura.