Flandre's Repentance Poem is a passive item in Reverie: Make Good Omissions, a mod for The Binding of Isaac.

-3 luck.

Causes newly generated items with quality 0-2 to be rerolled to items from the same item pool with 1 quality more, and has a chance to instead be rerolled to items from the same item pool with 2 quality more.

The chance scales with the absolute value of Isaac's luck, and equals to 34 + 1.32 × ｜LuckStat｜%. Caps at 100% with ±50 luck.

Items with the quest tag cannot be rerolled.

This item contributes towards the Musician transformation. Collecting 3 items from this set will grant Isaac +1 flat fire rate, and make him shoot piercing and spectral sonic tears with wider size.

Flandre's Repentance Poem can be found in the following item pools:

The following tags are applied to this item:

The following special synergies and interactions for Flandre's Repentance Poem have been documented.

* Note that not all possible synergies and interactions are listed here.

This item pays tribute to the Touhou doujin song "The Repentance Poem of the Blue Moon ~ Universal Nemesis", and therefore it contributes towards the Musician transformation.
The original source of this song is Flandre Scarlet's theme, "U.N. Owen was her?".

This item's description is taken from a line of lyrics in this song. When Tainted Seija picks up this item, its description changes to: “At that time, I lacked any reason”, which is also a lyric from the same song.

Despite being a Quality 4 item, this is not weakened by Tainted Seija's mechanics, but is instead specially enhanced by her. This is because the item's design theme revolves around a "bad child's letter of repentance", embodying a plea for redemption or compassion. This meaning resonates thematically with Tainted Seija's own design concept of "Seija Kijin oppressed by the powerful".

This item's design of using luck to influence its chance is a reference to the effect of Perfection. However, the practice of judging a child as "good" or "bad" based on academic performance is one-sided. Therefore, the item uses the absolute value of luck to determine its chance.

• Download Reverie: Make Good Omissions from the Steam Workshop.