In-game pickup line
“Matt's kidney stone”
Mechanics
What Kidney Stone does
- Isaac sometimes stops firing while a special shot charges.
- The release sends out several tears and a kidney stone; the older permanent speed and range penalties do not apply in Repentance.
Achievement #232
How to unlock it
Complete The Guardian (challenge #30).
Unlocking an item and finding it during a run are separate steps.
Browse challenge rewardsIn a run
Practical note
Prepare to dodge while the attack charges instead of expecting uninterrupted fire.
Reference
Game data and sources
The item ID, quality and pool listings, icon, game-file tags, and short pickup line come from the extracted Repentance files. This effect explanation is an editorial summary checked against the references below. Repentance+ can differ.
