Implement plasma sword instakill

Zennysoft.Game.Ma/src/player/PlayerEffectService.cs

@@ -0,0 +1,26 @@
+using Godot;
+using Zennysoft.Ma.Adapter;
+using Zennysoft.Ma.Adapter.Entity;
+
+internal class PlayerEffectService
+{
+  private IPlayer _player;
+  public PlayerEffectService(IPlayer player)
+  {
+    _player = player;
+  }
+
+  public void TakeSelfDamage(int damage)
+  {
+    _player.TakeDamage(new AttackData(5, ElementType.None, true, true));
+  }
+
+  public void Instakill(IEnemy enemy)
+  {
+    var rng = new RandomNumberGenerator();
+    rng.Randomize();
+    var rand = rng.RandiRange(1, 100);
+    if (rand <= _player.TotalLuck)
+      enemy.Die();
+  }
+}