The Starbuster Core is a Hardmode accessory dropped by Stellar Culex once Astrum Aureus has been defeated. While equipped the player gains +1 minion slots and all minion attacks will have a 33.33% chance to release a small astral explosion that damages enemies for 50% of the minion's damage.
- This accessory can also be obtained from the Astral Crate after Astrum Aureus has been defeated.
- Astral explosions from the Starbuster Core softcaps at 60 summon damage. Any amounts exceeding it will be 90% less effective.
- The explosion effect is identical to the Star-Tainted Generator, will be overridden by the Nucleogenesis's sparks, and will override Nuclear Rod's aura and Jelly-Charged Battery's orbs.