diff --git a/website/common/locales/en/gear.json b/website/common/locales/en/gear.json
index 381ad206e8..3c4d10b86c 100644
--- a/website/common/locales/en/gear.json
+++ b/website/common/locales/en/gear.json
@@ -2213,6 +2213,8 @@
   "backMystery202010Notes": "You are the night! So fly as silently as a midnight cloud with these swift purple wings. Confers no benefit. October 2020 Subscriber Item.",
   "backMystery202012Text": "Frostfire Wings",
   "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.",
 
   "backSpecialWonderconRedText": "Mighty Cape",
   "backSpecialWonderconRedNotes": "Swishes with strength and beauty. Confers no benefit. Special Edition Convention Item.",
@@ -2407,6 +2409,8 @@
   "headAccessoryMystery202009Notes": "These feathery appendages will help you find your way even in the dark of night. Confers no benefit. September 2020 Subscriber Item.",
   "headAccessoryMystery202102Text": "Charming Tiara",
   "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.",
   "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 7506d8186b..5461d124c3 100644
--- a/website/common/locales/en/subscriber.json
+++ b/website/common/locales/en/subscriber.json
@@ -121,6 +121,7 @@
     "mysterySet202102": "Charming Champion Set",
     "mysterySet202103": "Blossom Viewing Set",
     "mysterySet202104": "Thistle Guardian Set",
+    "mysterySet202105": "Nebula Dragon 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 114a9480f3..136c1bbc77 100644
--- a/website/common/script/content/gear/sets/mystery.js
+++ b/website/common/script/content/gear/sets/mystery.js
@@ -84,6 +84,7 @@ const back = {
   202009: { },
   202010: { },
   202012: { },
+  202105: { },
 };
 
 const body = {
@@ -189,6 +190,7 @@ const headAccessory = {
   202005: { },
   202009: { },
   202102: { },
+  202105: { },
   301405: { },
 };
 
diff --git a/website/raw_sprites/spritesmith/gear/events/mystery_202105/back_mystery_202105.png b/website/raw_sprites/spritesmith/gear/events/mystery_202105/back_mystery_202105.png
new file mode 100644
index 0000000000..9cbb8245a2
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diff --git a/website/raw_sprites/spritesmith/gear/events/mystery_202105/headAccessory_mystery_202105.png b/website/raw_sprites/spritesmith/gear/events/mystery_202105/headAccessory_mystery_202105.png
new file mode 100644
index 0000000000..b556aa6257
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diff --git a/website/raw_sprites/spritesmith/gear/events/mystery_202105/shop_back_mystery_202105.png b/website/raw_sprites/spritesmith/gear/events/mystery_202105/shop_back_mystery_202105.png
new file mode 100644
index 0000000000..5ef0e90780
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diff --git a/website/raw_sprites/spritesmith/gear/events/mystery_202105/shop_headAccessory_mystery_202105.png b/website/raw_sprites/spritesmith/gear/events/mystery_202105/shop_headAccessory_mystery_202105.png
new file mode 100644
index 0000000000..6bfe5925c0
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diff --git a/website/raw_sprites/spritesmith/gear/events/mystery_202105/shop_set_mystery_202105.png b/website/raw_sprites/spritesmith/gear/events/mystery_202105/shop_set_mystery_202105.png
new file mode 100644
index 0000000000..e042255920
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