Mirror Bookends 📖

First two digits are reversed as the last two.

🎯 How you earn it

The rule as the game writes it: First two digits are reversed as the last two. Enter any number from 0 to 1,000,000 into the RNGdle Calculator and it tells you whether that one qualifies, along with every other badge the same roll pulls in.

🔢 The smallest rolls that earn it

Read the total column separately from the badge. A badge is one property; what the roll scores is everything it happens to have at once, which is why the smallest mirror bookends roll and a mid-table roll can look nothing alike.

🧩 Where it sits in the family rule

Mirror Bookends belongs to the Bookends family, alongside 2 other badges. Inside a family the badges are alternatives: when one roll earns two of them, only the highest-EP badge keeps its points and the rest score nothing.

So Mirror Bookends only pays out on rolls where nothing bigger in the same family also fits. The one that most often beats it here is Paired Bookends at 11,122 EP.

• Paired Bookends 11,122 EP outranks this badge
• Bookends 10,010 EP same EP

🗂️ Where it fits in the 233 badge register

The game bands badges by how often they turn up, and Mirror Bookends lands in Rare - the band the game describes as 0.1-1% of rolls, carrying under 100,000 EP. That is the one rule the whole pricing table follows: a badge is worth more precisely because it almost never happens, so Mirror Bookends at 10,010 EP is rare rather than generous.

The game files it with 📐 Sacred Geometry. The full RNGdle Badges page shows every badge with its rule, EP and odds, and the pattern guide groups them by the kind of thing each one looks for.

• Cascade badge · Anomaly · 3,333,337 EP
• Strobogrammatic badge · Epic · 502,513 EP
• Ascension badge · Epic · 219,298 EP
• Echo badge · Epic · 100,100 EP
• Palindrome badge · Rare · 50,025 EP

The rule text, EP value, tier and published odds are the game's own. The counted share - how many of the 1,000,001 possible rolls actually earn the badge - comes from running the badge rules across the whole range, which is the same code the RNGdle Calculator uses, so the figures above and the tool agree by construction rather than by copy.

❓ FAQ