EMP Blast (like the apex but not the core): Mega Bomb blast radius destroys bullets. Damage is reduced by 20%.
Disintegrator EMP: Mega Bomb Blast Radius Destroys bullets. Each destroyed bullet deals 4 blast damage in a radius of 5-10. Decreases damage of Mega Bomb by 25%. Legendary Rarity Mod, costs 15 nova cores.
Infinite Fission: Can hold mega bomb charge for an unlimited amount of time. Each second mega bomb is held increases damage by 10 up to a maximum of 500 damage (assuming no other mods are applied). Decreases blast radius by 20, and increases charge recovery time by 2 seconds.