diff --git a/README.md b/README.md
index 8a66290..0ff1649 100644
--- a/README.md
+++ b/README.md
@@ -88,6 +88,8 @@ All primary types and values are prefixed with `Scryfall` to avoid conflict with
 
 Enum fields are described both in terms of an enum and a set of strings in order to give you the option of interacting with that field with either one.
 
+In order to use the provided enum values in runtime code (i.e. outside of just compile-time type checking), you may need to configure your project's build pipeline/module bundler to ensure it is transpiling the Typescript source code in the `@scryfall/api-types` package. Many module bundlers exclude `node_modules` from Typescript transpilation for performance reasons, but provide methods to force inclusion of specific paths (e.g. Webpack's `module.rules`, or Next.js's `transpilePackages` configurations).
+
 [semver]: https://semver.org/
 [api]: https://scryfall.com/docs/api
 [issues]: https://github.com/scryfall/api-types/issues
diff --git a/src/objects/Card/CardFields.ts b/src/objects/Card/CardFields.ts
index 034ec2b..736648e 100644
--- a/src/objects/Card/CardFields.ts
+++ b/src/objects/Card/CardFields.ts
@@ -264,6 +264,12 @@ export namespace ScryfallCardFields.Gameplay {
      * @type Integer
      */
     edhrec_rank?: number;
+    /**
+     * True if this card is on the Commander Game Changer list.
+     *
+     * @see {@link https://mtg.wiki/page/Commander_(format)/Game_Changers}
+     */
+    game_changer?: boolean;
     /**
      * An array of keywords that this card uses, such as 'Flying' and 'Cumulative upkeep'.
      */
diff --git a/src/objects/Card/values/FrameEffect.ts b/src/objects/Card/values/FrameEffect.ts
index f7025f6..2208fe7 100644
--- a/src/objects/Card/values/FrameEffect.ts
+++ b/src/objects/Card/values/FrameEffect.ts
@@ -45,4 +45,6 @@ export enum ScryfallFrameEffect {
   FanDfc = "fandfc",
   /** The cards have the Upside Down transforming marks */
   UpsidedownDfc = "upsidedowndfc",
+  /** The cards have Spree asterisks */
+  Spree = "spree",
 }