I Am the Protagonist's All-Knowing Grandpa

Demons descend upon the world, and myth begins anew. The world is in turmoil, and the talented rise to meet the times. Feng Xi thought it was finally his turn to be the protagonist and reach the pinnacle of life. But how did he end up running into these overpowered cheats...? His eldest senior brother, Sun Wukong, is a System user; his second senior brother, Zhu Wuneng, transmigrated into a good-for-nothing; his third junior brother, Sha Wujing, was reborn... And their master is an invincible demon king... Sigh. Forget it. He'll just be the wise old man behind the protagonist, guiding him along. PS: This book is on hiatus. I've started a new one, so interested readers are welcome to check it out!