Put on the hulk muscles amp mask and pretend to bring hulks super human strength into the battler the avengers are assembling to take on their greatest enemy ultron can they defeat him and save humanity the avengers will need all of their power to defeat ultron and his army of dronesr put on muscles that get bigger like hulks hulk muscles amp mask lets you unleash mega muscles just like the avengers mightiest heror imagine the hulks power with the hulk muscles amp mask as you ch