arcane missle initial logic

Items/ArcaneMissle/ArcaneMissleBehavior.cs

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+using Terraria;
+using Terraria.ModLoader;
+
+namespace YHTMod.Items.ArcaneMissle; 
+
+public class ArcaneMissleBehavior : GlobalNPC {
+    
+    public override void OnHitByProjectile(NPC npc, Projectile projectile, int damage, float knockback, bool crit) {
+        if (!crit) {
+            base.OnHitByProjectile(npc, projectile, damage, knockback, false);
+            return;
+        }
+        Player player = Main.LocalPlayer;
+        
+        if (player.GetModPlayer<YhtPlayer>().arcaneMissle && projectile.DamageType == DamageClass.Magic) {
+            // player just crit with magic weapon while having arcane missle accessory equipped
+        }
+
+        base.OnHitByProjectile(npc, projectile, damage, knockback, true);
+    }
+}