diff --git a/mappings/net/minecraft/data/server/advancement/AdvancementTabGenerator.mapping b/mappings/net/minecraft/data/server/advancement/AdvancementTabGenerator.mapping
index e233a5b3bf..8f432efecf 100644
--- a/mappings/net/minecraft/data/server/advancement/AdvancementTabGenerator.mapping
+++ b/mappings/net/minecraft/data/server/advancement/AdvancementTabGenerator.mapping
@@ -2,3 +2,5 @@ CLASS net/minecraft/class_7785 net/minecraft/data/server/advancement/Advancement
 	METHOD method_10335 accept (Lnet/minecraft/class_7225$class_7874;Ljava/util/function/Consumer;)V
 		ARG 1 lookup
 		ARG 2 exporter
+	METHOD method_55578 createDummyEntry (Ljava/lang/String;)Lnet/minecraft/class_8779;
+		ARG 0 id
diff --git a/mappings/net/minecraft/data/server/advancement/onetwentyone/OneTwentyOneAdvancementProviders.mapping b/mappings/net/minecraft/data/server/advancement/onetwentyone/OneTwentyOneAdvancementProviders.mapping
new file mode 100644
index 0000000000..a447f00f3b
--- /dev/null
+++ b/mappings/net/minecraft/data/server/advancement/onetwentyone/OneTwentyOneAdvancementProviders.mapping
@@ -0,0 +1,4 @@
+CLASS net/minecraft/class_9051 net/minecraft/data/server/advancement/onetwentyone/OneTwentyOneAdvancementProviders
+	METHOD method_55579 createOneTwentyOneProvider (Lnet/minecraft/class_7784;Ljava/util/concurrent/CompletableFuture;)Lnet/minecraft/class_2409;
+		ARG 0 output
+		ARG 1 registryLookupFuture
diff --git a/mappings/net/minecraft/data/server/advancement/onetwentyone/OneTwentyOneAdventureTabAdvancementGenerator.mapping b/mappings/net/minecraft/data/server/advancement/onetwentyone/OneTwentyOneAdventureTabAdvancementGenerator.mapping
new file mode 100644
index 0000000000..0db1cc3e08
--- /dev/null
+++ b/mappings/net/minecraft/data/server/advancement/onetwentyone/OneTwentyOneAdventureTabAdvancementGenerator.mapping
@@ -0,0 +1 @@
+CLASS net/minecraft/class_9052 net/minecraft/data/server/advancement/onetwentyone/OneTwentyOneAdventureTabAdvancementGenerator
diff --git a/mappings/net/minecraft/data/server/advancement/vanilla/VanillaAdventureTabAdvancementGenerator.mapping b/mappings/net/minecraft/data/server/advancement/vanilla/VanillaAdventureTabAdvancementGenerator.mapping
index 19e35b7e27..05466d7049 100644
--- a/mappings/net/minecraft/data/server/advancement/vanilla/VanillaAdventureTabAdvancementGenerator.mapping
+++ b/mappings/net/minecraft/data/server/advancement/vanilla/VanillaAdventureTabAdvancementGenerator.mapping
@@ -41,3 +41,7 @@ CLASS net/minecraft/class_2412 net/minecraft/data/server/advancement/vanilla/Van
 		ARG 1 pair
 	METHOD method_54652 (Ljava/util/Set;Lnet/minecraft/class_7803$class_8905;)Z
 		ARG 1 template
+	METHOD method_55581 createKillMobAdvancements (Lnet/minecraft/class_8779;Ljava/util/function/Consumer;Ljava/util/List;)Lnet/minecraft/class_8779;
+		ARG 0 parent
+		ARG 1 exporter
+		ARG 2 monsters