Fantasy educational poster card illustration in 3:4 aspect ratio in the exact same art style as the series: A fantasy mage/biochemist in rich deep-blue and silver ornate robes and armor, channeling cosmic blue energy around glowing red blood cells and the structure of vitamin B12 (cobalamin). In the center floats a luminous vibrant cobalt-blue magical sphere with the bold chemical symbol "Co". Magical sparks, alchemical vials with blue liquids, and biological energy strands. At the bottom, a clear legible Russian text banner with the inscription: «Кобальт входит в состав витамина B12 (кобаламина)». Highly detailed digital fantasy art, epic lighting.
