adds a difficulty parameter

src/main/java/me/unurled/sacredrealms/sr/components/combat/CombatManager.java

@@ -46,6 +46,14 @@ public class CombatManager extends Manager {
 
     double luck = dLuck - eLuck;
 
+    if (!pm.isSRPlayer(player.getUniqueId())) {
+      return;
+    }
+    SRPlayer sr = pm.getPlayer(player.getUniqueId());
+    if (sr == null) {
+      return;
+    }
+
     if (luck < -1000) {
       // 100% chance of miss
       player.sendMessage(comp("<red>You dodged!"));
@@ -56,7 +64,7 @@ public class CombatManager extends Manager {
       // 100% chance of critical hit
       luck = 10000d;
       player.playSound(player, Sound.ENTITY_PLAYER_ATTACK_CRIT, 1.0f, 1.0f);
-      damage = damage * 2;
+      damage = damage * 2 * sr.getDifficulty().getDamageMultiplier();
     }
 
     if (luck < 0) {
@@ -71,7 +79,7 @@ public class CombatManager extends Manager {
       // chance of critical hit
       player.playSound(player, Sound.ENTITY_PLAYER_ATTACK_CRIT, 1.0f, 1.0f);
       // damage * 2
-      damage = damage * 2;
+      damage = damage * 2 * sr.getDifficulty().getDamageMultiplier();
     }
 
     // apply damage

src/main/java/me/unurled/sacredrealms/sr/components/difficulty/Difficulty.java

@@ -0,0 +1,42 @@
+package me.unurled.sacredrealms.sr.components.difficulty;
+
+import static me.unurled.sacredrealms.sr.utils.Component.textComp;
+
+import net.kyori.adventure.text.TextComponent;
+import net.kyori.adventure.text.format.NamedTextColor;
+import net.kyori.adventure.text.format.TextColor;
+
+public enum Difficulty {
+  EASY(textComp("Easy"), 1.75, 0.75, NamedTextColor.GREEN),
+  NORMAL(textComp("Normal"), 1, 1, NamedTextColor.YELLOW),
+  HARD(textComp("Hard"), 0.75, 1.75, NamedTextColor.RED),
+  INSANE(textComp("<obf>aa</obf>Insane<obf>aa</obf>"), 0.05, 5, NamedTextColor.DARK_RED);
+
+  private final TextComponent name;
+  private final double damageMultiplier;
+  private final double xpMultiplier;
+  private final TextColor color;
+
+  Difficulty(TextComponent name, double damageMultiplier, double xpMultiplier, TextColor color) {
+    this.name = name;
+    this.damageMultiplier = damageMultiplier;
+    this.xpMultiplier = xpMultiplier;
+    this.color = color;
+  }
+
+  public TextComponent getName() {
+    return this.name;
+  }
+
+  public double getDamageMultiplier() {
+    return this.damageMultiplier;
+  }
+
+  public double getXpMultiplier() {
+    return this.xpMultiplier;
+  }
+
+  public TextColor getColor() {
+    return this.color;
+  }
+}

src/main/java/me/unurled/sacredrealms/sr/components/player/SRPlayer.java

@@ -11,6 +11,7 @@ import java.util.List;
 import java.util.Map;
 import java.util.UUID;
 import me.unurled.sacredrealms.sr.components.attributes.Attribute;
+import me.unurled.sacredrealms.sr.components.difficulty.Difficulty;
 import me.unurled.sacredrealms.sr.components.item.Item;
 import me.unurled.sacredrealms.sr.events.player.PlayerKillEvent;
 import me.unurled.sacredrealms.sr.managers.Manager;
@@ -39,6 +40,7 @@ public class SRPlayer {
   @Expose private List<PotionEffect> potionEffects = new ArrayList<>();
   @Expose private Inventory inventory;
   @Expose private List<Integer> treasuresOpened = new ArrayList<>();
+  @Expose private Difficulty difficulty;
   private boolean isClientBuilder = false;
   private boolean firstTime = true;
 
@@ -255,7 +257,7 @@ public class SRPlayer {
 
   public void setExperience(Long experience) {
     // checks if experience is above next level requirements
-    if (experience >= levelRequirements.get(level - 1)) {
+    if (experience >= levelRequirements.get(level - 1) * difficulty.getXpMultiplier()) {
       PlayerManager pm = Manager.getInstance(PlayerManager.class);
       setLevel(level + 1);
       pm.levelUp(this, level - 1);
@@ -290,4 +292,12 @@ public class SRPlayer {
   public void setFirstTime(boolean b) {
     firstTime = b;
   }
+
+  public Difficulty getDifficulty() {
+    return difficulty;
+  }
+
+  public void setDifficulty(Difficulty difficulty) {
+    this.difficulty = difficulty;
+  }
 }