It's The Fear Tab por Within Temptation

Gm            D#     Cm          D      Gm        D#         Cm          D
It waits for the day, I will let it out to give it a reason, to give it its might

  D#              Cm                      Gm                     Dm
I fear who I am becoming, I feel that I'm losing the struggle within
  D#             Cm                             Gm                     F
I can no longer restrain it, my strength, it is fading, I have to give in
         Gm          C         A#        F               Gm             C       F
It's the fear of the dark it's growing inside of me they won, they will come to life
        Gm        C            A#      F               D#      F          Gm
Have to save my beloved, there is no escape because my fate is horror and doom

Gm             D#             Cm          D   Gm            D#          Cm            D
Hold down your head now, just let me pass by, don't feed my fear if you don't want it out

Cm           Gm             A#              F     D#              Cm              D
Long ago, it came to me and ever since that day infected with its rage but ends today