Brother Dai?

"B-brother Dai used to be a local thug around this part of the Jiangbei city! He was very powerful and quite high on the ladder of the underworld! Later, after the apocalypse, he with this large number of gang members and their basic weapons survived for so long and even established their base here. A-and he can use those weird and scary looking plant roots to attack people and zombies. In the beginning, we only used to survive but after one day, he suddenly gained his superpower, and our lives also got better almost instantly. He started killing zombies left and right for that shiny crystal in its brain. He also led us to kill zombies and said that whoever gives him the crystal cores in the zombie's head will be protected by him and enjoy many benefits."