added "forcegive" argument (defaults to false) to prevent getting an advancement multiple times.

plugin/src/main/java/io/lumine/achievements/achievement/AchievementImpl.java

@@ -213,7 +213,6 @@ public class AchievementImpl extends Achievement implements MenuData<Achievement
                     .model(iconModel)
                     .hideAttributes()
                     .lore(description)
-                    .skullTexture(TEXTURE.get(this))
                     .build();
         } else {
             this.menuItem = ItemFactory.of(this.iconMaterial)

plugin/src/main/java/io/lumine/achievements/compat/mythicmobs/GrantAchievementMechanic.java

@@ -13,36 +13,43 @@ import org.bukkit.entity.Player;
 public class GrantAchievementMechanic implements ITargetedEntitySkill {
 
     private final MythicAchievementsPlugin plugin;
-    private String achievement;
-    private boolean giveRewards = false;
+    private final String achievement;
+    private final boolean giveRewards;
+    private final boolean forceGive;
 
     public GrantAchievementMechanic(MythicAchievementsPlugin plugin, MythicLineConfig config) {
         this.plugin = plugin;
-        
+
         this.achievement = config.getString(new String[] {"achievement", "achieve", "a"}, null);
+        this.giveRewards = config.getBoolean("giverewards", false);
+        this.forceGive = config.getBoolean(new String[] {"force", "f", "forcegive"}, false);
     }
 
     @Override
     public SkillResult castAtEntity(SkillMetadata skillMetadata, AbstractEntity abstractEntity) {
-        if(!abstractEntity.isPlayer()) {
+        if (!abstractEntity.isPlayer()) {
             return SkillResult.INVALID_TARGET;
         }
 
         var maybeAchieve = plugin.getAchievementManager().getAchievement(achievement);
-        if(maybeAchieve.isEmpty()) {
+        if (maybeAchieve.isEmpty()) {
             return SkillResult.INVALID_CONFIG;
         }
-        
+
         var achieve = maybeAchieve.get();
-        
+
         var player = (Player) abstractEntity.getBukkitEntity();
         var profile = plugin.getProfiles().getProfile(player);
 
+        if (profile.hasCompleted(achieve) && !forceGive) {
+            return SkillResult.SUCCESS;
+        }
+
         profile.completeAchievement(achieve, giveRewards);
 
         return SkillResult.SUCCESS;
     }
-    
+
     @Override
     public ThreadSafetyLevel getThreadSafetyLevel() {
         return ThreadSafetyLevel.SYNC_ONLY;