Friendly Neighborhood Spider-Man, Vol. 1 #7 (Cvr A) (2006)

Masks, Part 2
El Muerto is in the hospital, and Spider-Man arrives in time to prevent his death at the hands of El Dorado. Their fight takes them into a lab, where Peter is able to find a way to get through El Dorado's mystic golden armour.
Release Date: 2006