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Plugins/PkmnLib.Plugin.Gen7/Scripts/Side/FriendGuardEffect.cs

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+namespace PkmnLib.Plugin.Gen7.Scripts.Side;
+
+[Script(ScriptCategory.Side, "friend_guard")]
+public class FriendGuardEffect : Script
+{
+    private readonly HashSet<IPokemon> _placerPokemon = [];
+
+    public void OnAdded(IPokemon placer)
+    {
+        _placerPokemon.Add(placer);
+    }
+
+    public void OnRemoved(IPokemon placer)
+    {
+        _placerPokemon.Remove(placer);
+        if (_placerPokemon.Count == 0)
+        {
+            RemoveSelf();
+        }
+    }
+
+    /// <inheritdoc />
+    public override void ChangeIncomingMoveDamage(IExecutingMove move, IPokemon target, byte hit, ref uint damage)
+    {
+        var modifier = Math.Pow(0.75f, _placerPokemon.Count);
+        damage = (uint)(damage * modifier);
+    }
+}