diff --git a/localization/en-us.lua b/localization/en-us.lua
index 605b93b..7edfbed 100644
--- a/localization/en-us.lua
+++ b/localization/en-us.lua
@@ -457,6 +457,7 @@ return {
             c_Roland_Eternally_Crimson = "Eternally Crimson",
             c_Roland_Eternally_Verdant = "Eternally Verdant",
             c_Roland_Eternally_Violet = "Eternally Violet",
+            c_Roland_Glass = "Glass House",
             c_Roland_Go = "Pass GO",
             c_Roland_Jokerful = "Jokerful",
             c_Roland_Pastries = "Sweet Pastries",
@@ -495,6 +496,8 @@ return {
             ch_c_Roland_Eternally_Crimson = {"{C:attention}Crimson Heart{}'s effect is active every blind"},
             ch_c_Roland_Eternally_Verdant = {"{C:attention}Verdant Leaf{}'s effect is active every blind"},
             ch_c_Roland_Eternally_Violet = {"{C:attention}Violet Vessel{}'s effect is active every blind"},
+            ch_c_Roland_Glass1 = {"Played cards with no seal have a"},
+            ch_c_Roland_Glass2 = {"{C:green}1 in 4{} chance to gain {C:dark_edition}Glass Seal"},
             ch_c_Roland_Go = {"Set money to {C:money}$0 {}when entering the shop"},
             ch_c_Roland_Jokerful = {"The only jokers are {C:mult}Joker{} and {C:chips}Ms. Joker"},
             ch_c_Roland_Pastries = {"All blinds, cards, and tags are of {C:gold}Bakery{} or {C:blue}Roland"},
diff --git a/manifest.json b/manifest.json
index df581ec..ee621bd 100644
--- a/manifest.json
+++ b/manifest.json
@@ -3,7 +3,7 @@
     "id": "Roland",
     "name": "Roland",
     "prefix": "Roland",
-    "version": "2.8.33",
+    "version": "2.8.34",
     "badge_colour": "8BE9FD",
     "display_name": "Roland",
     "main_file": "src/main.lua",
diff --git a/src/challenge.lua b/src/challenge.lua
index 51221a5..3b7850e 100644
--- a/src/challenge.lua
+++ b/src/challenge.lua
@@ -42,6 +42,25 @@ end
 local pastries, amber, cerulean, crimson, verdant, violet =
     bans(), bans(), bans(), bans(), bans(), bans()
 
+SMODS.Challenge {
+    key = "Glass",
+    rules = {custom = {{id = "Roland_Glass1"}, {id = "Roland_Glass2"}}},
+    pronouns = "they_them",
+    config = {extra = {odds = 4}},
+    calculate = function(self, context)
+        if not context.after or context.blueprint_card then
+            return
+        end
+
+        f(G.play.cards):where(function(v)
+            return not v:get_seal(true) and
+                SMODS.pseudorandom_probability(self, self.key, 1, self.config.extra.odds, self.key)
+        end):each(function(v)
+            v:set_seal "Roland_glass"
+        end)
+    end,
+}
+
 SMODS.Challenge {
     key = "Go",
     rules = {custom = {{id = "Roland_Go"}}},