Apocalyptic System: Awakening Three Powers at the Beginning Makes Me Invincible

What a mess!

I traveled here with my friends and found this book. The title of the book exudes a strange light. I said this book is very poisonous and cannot be read. My friend holds the Mahayana cultivation level and has the blood of Shennong. If you look at the name of this book, you will know that it is poison. No one in the world has tasted it and does not know its nature. I am a descendant of Shennong and my cultivation is as high as the heavens. What should I fear? Today I will follow the example of my ancestors and taste the herbs. Then I opened the book, and all my friends and I admired his courage. There was an immortal who wanted to write a poem for the warrior. But I never expected that in just a split second, my friend would scream in agony after just looking at one page of the book, and everyone would be horrified! His face was bleeding from seven holes and he was struggling to walk. He was vomiting blood in his mouth, and his whole body instantly became withered and thin. He quickly took out the elixir and let him take it, but before he could save him, he was unable to save him. When my friend was dying, he only left one person alive. "This book is more poisonous than Zhi Shi Jian" and he turned into ashes and left. Only then did he remember what the ancients said, even the Da Luo Immortals can't save you. Everyone lamented that the ancients never deceived me. At this point, I would like to advise everyone who does not have Da Luo Jin Immortal cultivation to not watch and leave quickly. Don't forcefully pretend to be a good person. I hope those who come after me will remember it!

The protagonist's early development is worse than that of a passerby, and I don't know what the system is used for.