necromancer, undead, lich, BTD6, Bloons Tower Defense 6, strategy, game character, wizard, dark robe, glowing eyes, summoning undead balloons, floating, eerie graveyard, full moon, spooky trees, misty ambiance, dramatic lighting, top-down view, magical energy, detailed textures, strategic placement, powerful spells, action pose, enchanted staff, mystical symbols, intense battle scene, game level, defense towers, strategic planning, vibrant colors, dynamic shadows, high contrast, fantasy setting.