Some of the given clues suggest one specific answer, and some are far more general. The trick comes in noticing that the answers are all one letter away from the names of superheroes, as hinted by the title (Zeroes -> Heroes), as well as the flavor text (have the day -> save the day). The solutions and their respective heroes are:
- Rosin -> Robin
- Anger -> Angel
- Wisp -> Wasp
- Ironmaw -> Iron Man
- Hull -> Hulk
- Riven -> Raven
- Right wing -> Nightwing
- Trax -> Drax
- Yeast -> Beast
- Steep -> Steel
- Racket -> Rocket
- Grout -> Groot
- Blaze -> Blade
Taken in order, the letters from the names of the superheroes that were changed to form the answers spell out BLANK AND BLOOD. This is a clue for FLESH, which is one letter away from the superhero FLASH, the answer.