diff --git a/website/common/locales/en/gear.json b/website/common/locales/en/gear.json
index 6a0989904c..e963333105 100644
--- a/website/common/locales/en/gear.json
+++ b/website/common/locales/en/gear.json
@@ -2301,6 +2301,8 @@
   "backMystery202012Notes": "The snowy feathers of these wings will grant you the speed of a wintry gale. Confers no benefit. December 2020 Subscriber Item.",
   "backMystery202105Text": "Nebula Dragon Wings",
   "backMystery202105Notes": "Glide through the starry sky and place yourself among the constellations! Confers no benefit. May 2021 Subscriber Item.",
+  "backMystery202109Text": "Lunar Lepidopteran Wings",
+  "backMystery202109Notes": "Glide softly through the twilight air without a sound. Confers no benefit. September 2021 Subscriber Item.",
 
   "backSpecialWonderconRedText": "Mighty Cape",
   "backSpecialWonderconRedNotes": "Swishes with strength and beauty. Confers no benefit. Special Edition Convention Item.",
@@ -2499,6 +2501,8 @@
   "headAccessoryMystery202102Notes": "Magnify your empathy and caring to new heights with this ornate golden tiara. Confers no benefit. February 2021 Subscriber Item.",
   "headAccessoryMystery202105Text": "Nebula Dragon Horns",
   "headAccessoryMystery202105Notes": "Don these iridescent horns and summon the magic of starlight. Confers no benefit. May 2021 Subscriber Item.",
+  "headAccessoryMystery202109Text": "Lunar Lepidopteran Antennae",
+  "headAccessoryMystery202109Notes": "Catch the scent of flowers on the breeze or the scent of change on the wind. Confers no benefit. September 2021 Subscriber Item.",
   "headAccessoryMystery301405Text": "Headwear Goggles",
   "headAccessoryMystery301405Notes": "\"Goggles are for your eyes,\" they said. \"Nobody wants goggles that you can only wear on your head,\" they said. Hah! You sure showed them! Confers no benefit. August 3015 Subscriber Item.",
 
diff --git a/website/common/locales/en/subscriber.json b/website/common/locales/en/subscriber.json
index 3ca59c0b2c..79a64cac38 100644
--- a/website/common/locales/en/subscriber.json
+++ b/website/common/locales/en/subscriber.json
@@ -125,6 +125,7 @@
     "mysterySet202106": "Sunset Siren Set",
     "mysterySet202107": "Beachy Keen Set",
     "mysterySet202108": "Fiery Shounen Set",
+    "mysterySet202109": "Lunar Lepidopteran Set",
     "mysterySet301404": "Steampunk Standard Set",
     "mysterySet301405": "Steampunk Accessories Set",
     "mysterySet301703": "Peacock Steampunk Set",
diff --git a/website/common/script/content/gear/sets/mystery.js b/website/common/script/content/gear/sets/mystery.js
index eb81176b04..4ff04c898c 100644
--- a/website/common/script/content/gear/sets/mystery.js
+++ b/website/common/script/content/gear/sets/mystery.js
@@ -86,6 +86,7 @@ const back = {
   202010: { },
   202012: { },
   202105: { },
+  202109: { },
 };
 
 const body = {
@@ -197,6 +198,7 @@ const headAccessory = {
   202009: { },
   202102: { },
   202105: { },
+  202109: { },
   301405: { },
 };
 
diff --git a/website/raw_sprites/spritesmith/gear/events/mystery_202109/back_mystery_202109.png b/website/raw_sprites/spritesmith/gear/events/mystery_202109/back_mystery_202109.png
new file mode 100644
index 0000000000..5dcdbe2566
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diff --git a/website/raw_sprites/spritesmith/gear/events/mystery_202109/headAccessory_mystery_202109.png b/website/raw_sprites/spritesmith/gear/events/mystery_202109/headAccessory_mystery_202109.png
new file mode 100644
index 0000000000..d904db136f
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diff --git a/website/raw_sprites/spritesmith/gear/events/mystery_202109/shop_back_mystery_202109.png b/website/raw_sprites/spritesmith/gear/events/mystery_202109/shop_back_mystery_202109.png
new file mode 100644
index 0000000000..d1fd6c01a4
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diff --git a/website/raw_sprites/spritesmith/gear/events/mystery_202109/shop_headAccessory_mystery_202109.png b/website/raw_sprites/spritesmith/gear/events/mystery_202109/shop_headAccessory_mystery_202109.png
new file mode 100644
index 0000000000..bbccffb7f9
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diff --git a/website/raw_sprites/spritesmith/gear/events/mystery_202109/shop_set_mystery_202109.png b/website/raw_sprites/spritesmith/gear/events/mystery_202109/shop_set_mystery_202109.png
new file mode 100644
index 0000000000..22742f246d
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