Binding of Isaac: Rebirth Wiki

(except in Rebirth)

Spider Mod is a passive item added in The Binding of Isaac: Afterbirth.

Effects[ | ]

  • Spawns a grey spider familiar that wanders around and allows Isaac to see tear damage and the health bars of all enemies.
  • (in Afterbirth † and Repentance) This item belongs to the Spider BabySpider Baby set. Collecting three items from this set will transform Isaac into a humanoid spider.

Notes[ | ]

  • (except in Repentance) For the sake of simplicity, all damage values shown are multiplied by 10 and rounded up to the nearest number.
    • (in Repentance) Damage values are no longer multiplied or rounded.
  • All stats effect damage dealt by Spider Mod is based on Isaac's damage stat.
  • Spider Mod reveals Mega Satan Head ingameMega Satan's health bar and is the only way to see his health.
  • Spider Mod shows the health of invincible enemies, holes created by Boss Little Horn ingameLittle Horn, and the golden statue of Boss Ultra Greed ingameUltra Greed.
  • Spider Mod doesn't show if a segmented enemy has individual segment health like Boss Larry Jr. ingameLarry Jr. or a health pool like Boss Chub ingameChub. Against enemies with invulnerable segments such as Boss Carrion Queen ingameCarrion Queen and Boss Scolex ingameScolex, its indicators will not differentiate between damage dealt to invulnerable and vulnerable segments.
  • Spider Mod's damage doesn't account for enemy damage reduction or invulnerability, which means that the damage indicators for (in Afterbirth † and Repentance) Mushroom (Enemy)Mushrooms, Stone GrimaceStone Grimaces, and similar enemies will be inaccurate.
  • (in Afterbirth † and Repentance) If Isaac transforms into Spider BabySpider Baby, it spawns a spider familiar who works similarly to Spider Mod.

Synergies[ | ]

  • Collectible BFFS! iconBFFS!: Makes Spider Mod bigger and increases the chance for Spider Mod to spawn a battery or blue spider. No effect on stat effect damage.
  • Collectible Hive Mind iconHive Mind: Makes Spider Mod bigger. Whether or not this impacts spawn chances or damage is unknown.

In-game Footage[ | ]

Trivia[ | ]

  • This item is a reference to Spidermod, a modification to the original The Binding of Isaac, which was made by one of the lead Rebirth developers, Spider853. One feature of Spidermod was to show damage numbers onscreen.