diff --git a/BloodNight-core/src/main/java/de/eldoria/bloodnight/command/bloodnight/ForceNight.java b/BloodNight-core/src/main/java/de/eldoria/bloodnight/command/bloodnight/ForceNight.java
index ebb7591f..06ab4883 100644
--- a/BloodNight-core/src/main/java/de/eldoria/bloodnight/command/bloodnight/ForceNight.java
+++ b/BloodNight-core/src/main/java/de/eldoria/bloodnight/command/bloodnight/ForceNight.java
@@ -47,8 +47,8 @@ public void onCommand(@NotNull CommandSender sender, @NotNull String alias, @Not
         world = args.asWorld(0, world);
 
         boolean enabled = configuration.getWorldSettings(world).isEnabled();
-        CommandAssertions.isTrue(!enabled, "error.worldNotEnabled", Replacement.create("WORLD", world));
-        CommandAssertions.isTrue(!nightManager.getBloodWorldsSet().contains(world), "forceNight.alreadyActive",
+        CommandAssertions.isTrue(enabled, "error.worldNotEnabled", Replacement.create("WORLD", world));
+        CommandAssertions.isFalse(nightManager.getBloodWorldsSet().contains(world), "forceNight.alreadyActive",
                 Replacement.create("WORLD", world.getName()));
         nightManager.forceNight(world);
         messageSender().sendMessage(sender, "forceNight.enabled",
diff --git a/BloodNight-core/src/main/java/de/eldoria/bloodnight/specialmobs/mobs/creeper/GhostCreeper.java b/BloodNight-core/src/main/java/de/eldoria/bloodnight/specialmobs/mobs/creeper/GhostCreeper.java
index 36e23fce..02f10e2f 100644
--- a/BloodNight-core/src/main/java/de/eldoria/bloodnight/specialmobs/mobs/creeper/GhostCreeper.java
+++ b/BloodNight-core/src/main/java/de/eldoria/bloodnight/specialmobs/mobs/creeper/GhostCreeper.java
@@ -18,8 +18,7 @@ public class GhostCreeper extends ExtendedSpecialMob<Vex, Creeper> {
     public GhostCreeper(Creeper creeper) {
         super(EntityType.VEX, creeper);
         Version optVersion = ServerVersion.getVersion();
-        // Entites can be invisible since 1.16.3. Hotfix for backwards compatibiliy to spigot 1.16.2
-        getBaseEntity().setInvulnerable(true);
+        getBaseEntity().setInvisible(true);
         new BukkitRunnable() {
             @Override
             public void run() {