Because I have not painted Mushrooms for a long time. And in general the theme of giant zombies is not disclosed, so ...
Little information on the world of Ololor:
Every living being has a certain reserve of vital energy, which is constantly wasted while using magic, masturbation (for each cell of the seed or egg must carry a supply of vital energy for the creation and revitalization of the fetus), or just life. When the life energy ends, the being dies of old age. But there are such moments. when the creature dies with a huge supply of vital energy. In this case, the body comes to life, and the creature becomes a zombie. cells of the body of zombies can no longer reproduce the expired energy, hence the zombie's lifetime is short-a year maximum. However, if you use magical artifacts for recharge. then Zombies will live much longer. Normally giants spend many times more life energy, because they need a natural anti-gravity life (in the event of any rpotivnom giant would be like a beached whale), and therefore does not have any zombie giants. Gribochek - so this zombie calls itself - draws vital energy from the fungi growing on her body - that's why she can live even after death. She came to Earth through one of the portals, which randomly appear between the worlds, and has since lived in a war-torn city, attracting the attention of scientists from all over the world.