0:14 the song begins (Corrupted Bubbles vs Blossom) 0:53 Pibby joins to the battle 1:09 Corrupted Buttercup joins to the battle 2:20 Bubbles breaks free and Blossom fall in the Darkness (Bubbles & Pibby vs Corrupted Blossom) 3:16 The song ends
so uh recap so bubbles is patient zero [probably] so at some point of the song pibby appears after pibby joins in an affected buttercup joins in in the middle of the song bubbles attacks blossom fully affecting her after bubbles corrupted blossom bubbles somehow breaks free at the end bubbles and pibby gets away from blossom