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If you’ve ever wanted to filter your stash for specific map modifiers (like increased rarity, pack size, or monster count) in Path of Exile 2, learning a bit of regex (regular expressions) can help. Below are some ready‐to‐use examples for stash searches. They highlight TONS of popular map traits, helping you quickly spot the juicy ones.

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General Filter
This first snippet highlights any map with at least one “good” modifier:
Explanation:

• ([3-9].|1..)%.*rar..(?!ch) – Looks for 30–99% increased rarity (excluding “chance” references).
  
• quan – Matches “quantity” references.
  
• ([3-9].)%.*ed.pa – Looks for 30–99% pack size references (“ed pack”).

Waystone Drop Chance
Highlights any waystone with over 500% drop chance:

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Here are examples to highlight multiple good modifiers simultaneously.

• Rare monsters & High Quant:
  
  "([3-9].)%.*are.m" "(1[5-9]|2.)%.*quan"
  
  
• Rarity of Items & Rare Monsters:
  
  "([6-9].|1..)%.*rar..(?!ch)" "([4-9].)%.*are.m"
  
  
• Increased Rarity + Rare Monsters & Additional Rare Mod:
  
  "nc.*rar..(?!ch)" "e.1"
  
  
• Increased Rarity + Rare Monsters & Pack Size:
  
  "nc.*rar..(?!ch)" "sed.pa"
  
  
• High Pack Size Only:
  
  "([4-9].)%.*ed.pa"
  
  
• Pack Size + Monster Packs:
  
  "sed.pa" "mon.*packs"
  
  
• Increased Rarity & Rare Monsters + Monster Packs:
  
  "nc.*rar..(?!ch)" "mon.*packs"
  
  
• High Rarity & Quant:
  
  "([6-9].|1..)%.*ity..(?!ch)" "(1[5-9]|2.)%.*qu"

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Community members have noted:

“Give an exile regex and he maps juicy for a day; teach an exile regex, and he’ll juice them forever!”

• Regex is just a powerful text‐pattern matching tool.
  
• It’s not PoE‐specific, so it works in many stash search tools, Awakened Trade, etc.
  
• Characters like ., *, +, and ? have special meanings:
  
  1. Dot (.) = any single character
     
  2. Asterisk (*) = repeat any number of times
     
  3. Plus (+) = repeat one or more times
     
  4. Bracket [ ] = specify a range of allowed chars (e.g. [0-9])
     
  5. Parentheses ( ) = group expressions or define capturing groups
     
  6. Question mark (?) = zero or one instance of the preceding element
     
  7. Pipe (|) = logic OR for alternate patterns
• Plenty of Regex tutorials[coderpad.io] exist to get you started.

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Regex can drastically speed up how you filter for those prized maps or items with specific stats. Use it alongside your preferred trade/stash tool:

• Awakened Trade, or
  
• the game’s built‐in stash search.

Practice a bit, and you’ll find searching for “juicy maps” becomes second nature. If you have suggestions or want more examples, let me know in the comments—happy mapping!

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• Original discussion from the Reddit thread by u/cheekygorilla and other community members.
  
• Regex guide link: The Complete Guide to Regular Expressions[coderpad.io]