Secret Wars #8 (Dec 1984)
During Secret Wars, Spider-Man's costume took a beating. In an effort to replace his costume he accidentally covered himself in an alien substance, which was able to adapt and resemble different costumes on command.
This costume will add a variety of additional cosmetic enhancements, which may include unique voiceovers, enhanced visual effects or extra animations and sometimes more.
How to get
The Spider-Man Symbiote costume is exclusive to the Ultimate Pack and cannot be obtained otherwise (does NOT drop in game)