Binding of Isaac: Rebirth Wiki

The Small Rock is an unlockable passive item.

Effects[ | ]

  • +1 damage.
  • -0.2 speed ((in Rebirth and Afterbirth) not applied until the next time Isaac's speed stat is updated or upon taking damage).
    • (except in Repentance) -0.2 maximum speed.
  • +0.2 tears ((in Rebirth and Afterbirth) not applied until the next time Isaac's tears stat is updated or upon taking damage).

Notes[ | ]

  • Has a small chance to be dropped from a destroyed tinted rock.
  • Normally only appears once per run, but can appear again if Isaac's items are re-rolled with Collectible D4 iconD4, Collectible D100 iconD100, or a Dice RoomDice Room.
  • (except in Repentance) Always has a chance to spawn as long as Isaac does not currently have it. This includes the possibility of spawning and obtaining multiple copies of The Small Rock on the same floor if not picked up the first time.
  • Taking the rock in the Boss RushBoss Rush from a tinted rock in the room will count as taking an item and consequently trigger Boss Rush. The other items do not disappear and will stay until one is picked up.

Interactions[ | ]

  • (except in Rebirth)Collectible Diplopia iconDiplopia/(in Afterbirth † and Repentance)Collectible Crooked Penny iconCrooked Penny: Additional copies grant an additional tears up and speed down with no further increase in damage.

In-game Footage[ | ]

Trivia[ | ]

  • In the original Binding of Isaac, the player's tears would take on a grey color after Small Rock has been picked up. In Rebirth, however, the tears will be red.
    • However, before the Halloween Update, the player’s tears were blood tears. The reasoning for the change from blood to grey is unknown.
  • This item is used in Head Trauma (challenge #3).
    • Head Trauma is unlocked by default, despite the fact that Small Rock isn't. This item, (in Repentance)Collectible TMTRAINER iconTMTRAINER, (in Repentance)Collectible Dirty Mind iconDirty Mind and (in Repentance)Collectible Spirit Sword iconSpirit Sword are the only items that appear in challenges before they are unlocked. Small Rock and TMTRAINER are also notable for not being unlocked by beating the challenge they appear in.