I need little help with code.

[DeltaRune Caicyo]

Hi terrarians!
My little sister ask me for make simple Cheat Mod that makes The Eternial Crystal from Old One's Army Unbreakable...
I know this is stupid, but if she ask i do.
Okay, time to talk about problem.

There is a code:

using System.Collections.Generic;
using Microsoft.Xna.Framework;
using Terraria;
using Terraria.ID;
using Terraria.ModLoader;

namespace UnbreakableCrystal
{
    public class UnbreakableCrystalNPCs : GlobalNPC
    {

        public override bool InstancePerEntity
        {
            get
            {
                return true;
            }
        }

        public override void SetDefaults(NPC npc)
        {
            if (npc.type == NPCID.DD2EterniaCrystal)
            {
                npc.dontTakeDamageFromHostiles = true;
            }
        }
    }
}

I'm not a programmer. I use information from tModLoader wiki and examples.
What is problem? This code not working.
I try make Crystal Immortal, try add more HP, try add more Defense. In game nothing changes. BUT....
If i change (npc.type == NPCID.DD2EterniaCrystal) to (npc.friendly) this code perfectly working and makes all town Npc's dont take damage from mobs.

What i do wrong or what wrong with code?
Thanks for attention. Have a nice day

 

[jopojelly]

I looked, I couldn't make sense of it. It seems like the DD2EterniaCrystal npc just doesn't act like normal npc for some reason. I think this behavior is hardcoded in and not easily changed.

 

[DeltaRune Caicyo]

I looked, I couldn't make sense of it. It seems like the DD2EterniaCrystal npc just doesn't act like normal npc for some reason. I think this behavior is hardcoded in and not easily changed.

Thanks Jopojelly.