谷底石#562

Rock Bottom is an unlockable passive item added in The Binding of Isaac: Repentance.

• Rock Bottom originates from the Antibirth mod. In Antibirth, Rock Bottom could also appear from tinted rocks and Experimental Treatment was still able to lower Isaac's stats.
• This item is likely a reference to the stone that Jacob slept on when he dreamt of a ladder to heaven; upon awakening, he covers the stone in oil and dedicates it to the area where he had the vision, which he names Bethel. Its name is also a reference to the expression "Hitting rock bottom", which means being emotionally overwhelmed.
• The main cosmetic difference when holding this item is that Isaac faces upward slightly and stops visually crying, which may be a play on the term "things are looking up".
• Contrary to popular belief, Rock Bottom does not set Isaac's stats to the starting values. This was confirmed by Kilburn in the Binding of Isaac Discord server, when he stated that it doesn't do that and has never done that, even in the original release of Antibirth. Jacob and Esau Unlocks Boss Rush Unlocks The Binding of Isaac: Rebirth
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