Spider Mod

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

Effects

 * A familiar grey spider that wanders around and allows Isaac to see tear damage and the health bars of all enemies.
 * The spider will inflict a random status effect on any enemies it comes into contact with.
 * The spider will sometimes drop a battery when a room is completed.
 * The spider will sometimes spawn a Blue Spider when a room is completed.

Trivia

 * This item is a reference to Spidermod, a modification to the original Binding of Isaac; made by one of the lead Rebirth developers Spider853. One feature of Spidermod was to show damage numbers on screen.