Four. The number of years since Hydra began a new project. Three. The number of years since a new criminal surfaced. Two. The number of years since SHIELD took notice. One. The number of missions it takes to turn the world upside down.

[OLD VERSION: see new version, Shadow Wolf: The Iceberg] Four years ago, Hydra put Project HSCL into action. Four years ago, preteen Skyler Sors was killed. Three years ago, a new criminal appeared. Two years ago, SHIELD began to take notice of the mysterious Shadow Wolf. Today, Shadow Wolf is high priority. Today, the Avengers are tasked with infiltrating a Hydra base.