Illia 'Golem' Yefimchyk, known as the world's 'most monstrous bodybuilder', has died at 36 after a heart attack, although one report suggests he was 42 and died after cardiac arrest during surgery. Most outlets agree that he was 36 and died due to a heart attack. The circumstances of his death are somewhat unclear, with conflicting reports on his age and the events surrounding his death.