Spider

Entity Image
Base HP	6.5
Base HP	6.5
Stage HP	0
Stage HP	0
Entity ID	85.0
Found In

Spiders are arachnid enemies that can be commonly found in most chapters. They move quickly and will go in all directions randomly, making them unpredictable. However, if they have a direct line of sight on Isaac, and are close enough, they will move towards him. They are also able to fit through small diagonal gaps.

Variations

Big Spider

Entity Image
Base HP	20
Base HP	20
Stage HP	0
Stage HP	0
Entity ID	94.0
Found In

Big Spiders look like regular Spiders, but with a large black abdomen attached. They behave in the same way as the regular Spiders, having the same movement speed and erratic behavior. However, they have over triple the health of regular Spiders, and upon death, they will split into two regular Spiders. They will not split if they are killed by an explosion.

Swarm Spider

Entity Image
Base HP	4.5
Base HP	4.5
Stage HP	0.2
Stage HP	0.2
Entity ID	884.0
Found In

Swarm Spiders act much like normal Spiders but are much smaller and tend to come in much larger groups. They also hop and flash a bright yellow.

They are spawned by Eggies in large number when one dies.

Swarm Spiders cannot be damaged by Fire Places.

Strider

Entity Image
Base HP	6.5
Base HP	6.5
Stage HP	0
Stage HP	0
Entity ID	814.0
Found In	(Downpour Only) (Downpour and Dross only)

Striders are a type of spider that can only spawn in Downpour and special rooms in Dross. They glide on the water towards Isaac in short bursts and can swim across flooded gaps.

Gallery

• 

  A Spider on Isaac's Last Will.

• 

  Concept sketches of monsters implemented in Repentance, including the Swarm Spiders.

Notes

• The following spiders will not attack Isaac, deal contact damage or actively spawn enemies if he has Bursting Sack:
  • Spider, Big Spider, Level 2 Spider, Ticking Spider, Baby Long Legs, Small Baby Long Legs, Crazy Long Legs and Small Crazy Long Legs.
  • Spiders and Big Spiders no longer blink red when neutral due to it.
  • Swarm Spiders no longer blink yellow when neutral due to it.

Trivia

• The original Spider and Big Spider were first added to the original The Binding of Isaac game's DLC - Wrath of the Lamb.
• Striders are named after the family Gerridae, also known as water striders.
• Swarm Spiders have the lowest Stage HP among all entities in the game by far. It takes until Template:Stage I (etc.) before they have more than 5 HP, and then until Template:Stage / Template:Stage before they have more than 6 HP.

The Binding of Isaac: Rebirth
Achievements Challenges Completion Marks Items Trinkets Characters Chapters Rooms Transformations Attributes Bosses Monsters Pickups Modes Curses Objects Seeds Effects Endings
Collection Item Pools Version History Modding Music