Dying Light Unlimited Toxic Lichen Fluorescent Shrooms and Herbs. Go to the Western side of the map and follow my run through. I engaged the Zombies and set off the car bomb just for a laugh but you don't need to. By the time you collect the last Shrooms near the Zombies the whole lot of Toxic Lichens, Herbs and Shrooms will have re spawned so you can collect them again and again.