Rune Shard
RuneRepentanceUnlocked
How do you unlock Rune Shard?
Verified starting unlockSource data confirms that no unlock is required.
Activates a random rune effect that's weaker than normal. Only spawns when less than 6 different runes have been unlocked.
Available from the start
No unlock needed — this is available in every new save file.
What unlocking Rune Shard leads to
Nothing depends on this yet.
Source: bindingofisaacrebirth.wiki.gg
Imported 2026-09-13