Nameless Entity

Scientists have found a portal in a remote place in Europe. This portal leads to a forest with a ominous fog that you would rather not let it consume you. Amethyst Crystal's being the only thing protecting you, you find many monsters that seek blood. This Entity is one of them, they use darkness to their advantage and evolve frequently. They're extremely contagious and savage. Their spiral pulps being a sign that it's too late. Though this one ignores your presence. What will you do?(any gender)