Please don't do this. You will die a slow and painful death. I found the following information on what happens if someone eats death cap mushrooms.
The death cap's toxins quickly leave the digestive system and start attacking liver cells. The symptoms appear 8-24 hours later. Then, either the victim dies of dehydration or the symptoms recede. In that case, the victim will then often die of kidney or liver failure 4-12 days from the poisoning.
Let's look at it more thoroughly now.
After consumption of a death cap, the first stage of the poisoning starts almost immediately. The toxins are absorbed from the digestive system into the blood flow and begin attacking hepatocytes (liver cells). The symptoms of the poisoning appear only when a lot of these hepatocytes are destroyed.
In the first stage, some functions of the digestive system are disrupted. The victim becomes languid, dizzy, and chilly. Then they feel nausea and stomach ache, followed by heavy vomiting and diarrhea. Those lead to dehydration and demineralization. If the victim survives, the vomiting and diarrhea disappear entirely, which may calm the victim – falsely.
In the following days, the liver and kidneys will start malfunctioning. The liver enlarges. The victim increasingly urinates, and after about 4 to 5 days from poisoning, they feel better. If they are lucky, they recover. But in most cases, acute failure of the liver or kidneys follows.
In case of a slow progression, the victim dies 8 to 12 days after the poisoning. In the case of a fast progression, liver coma develops quickly, resulting in apathy, loss of consciousness, shaking, spasms, decreased blood pressure, mydriasis, and death 4 to 7 days after the poisoning.