Minecraft Forums

So... a ton of skeleton traps spawned on my mushroom island, I decided to kill all of them and get their gear to showoff or etc, I killed one, and got this strange bow, it has 2 Power enchants? this is not possible! I just had to post this because this was pretty interesting, look at this screenshot below for a second, this must be a game loot table bug, it added 2 of the same enchant on the same item, that is not possible normally.. I just wanted to share this weird thing for people to see... I wonder if this has happened to anyone else, probably not.

"WITH OUR POWERS COMBINED..!!!!!!!"

Nah, yeah, must've just been a loot table bug. Pretty interesting though.

weird, does it act as double power 1? or as power 2?

I have no idea, if I use it, I will lose it and I cannot repair it without losing the second power 1 enchant, but I'm assuming it will work like a power 2 bow, but I do not know.

Yeah, it really is. I'm gonna really treasure and put this bow somewhere nice, because this is a rare type of thing to happen, so it's worth doing something with it, but I'm not gonna use it, since my normal bow is a lot better. (reply to jtpetch0

Nope, it will only act like a Power 1 bow. The game has long been generating this type of otherwise impossible loot, but any duplicate enchants are just outright ignored.

It's just a bug, most likely. Pretty sure I had this happen too...

(this isn't here... I can't delete this, it's NOT here, just imagine it isn't here...)
)

Hmm, strange, also, this is obviously a bug in the loot table's of the mob, I don't really see mojang fixing this, this is a minor, and strange bug that doesn't really matter because it doesn't effect ANYTHING whatsoever in the game.

I'm fairly certain that duplicate damage enchantments do add together, at least I've seen YouTubers playing with weapons with duplicate Sharpness enchantments on a sword and it appeared to deal more damage than one enchantment by itself (mods like Damage Indicators make this easy to see). This also appears to work for Unbreaking, and you can use commands/NBT editing to put Smite and Sharpness on one weapon and they will both add damage. In a similar manner if you have Thorns on several pieces of armor each piece has a chance of applying damage and this probably applies to a single piece as well.

Here is some code that appears to iterate over the entire list of enchantments on an item and applies modifiers for each one:

/**
 * Return the (magic) extra damage of the enchantments on player equipped item.
 */
public static float getEnchantmentModifierLiving(EntityLivingBase par0EntityLivingBase, EntityLivingBase par1EntityLivingBase)
{
    enchantmentModifierLiving.livingModifier = 0.0F;
    enchantmentModifierLiving.entityLiving = par1EntityLivingBase;
    applyEnchantmentModifier(enchantmentModifierLiving, par0EntityLivingBase.getHeldItem());
    return enchantmentModifierLiving.livingModifier;
}


/**
 * Executes the enchantment modifier on the ItemStack passed.
 */
private static void applyEnchantmentModifier(IEnchantmentModifier par0IEnchantmentModifier, ItemStack par1ItemStack)
{
    if (par1ItemStack != null)
    {
        NBTTagList var2 = par1ItemStack.getEnchantmentTagList();

        if (var2 != null)
        {
            for (int var3 = 0; var3 < var2.tagCount(); ++var3)
            {
                short var4 = ((NBTTagCompound)var2.tagAt(var3)).getShort("id");
                short var5 = ((NBTTagCompound)var2.tagAt(var3)).getShort("lvl");

                if (Enchantment.enchantmentsList[var4] != null)
                {
                    par0IEnchantmentModifier.calculateModifier(Enchantment.enchantmentsList[var4], var5);
                }
            }
        }
    }
}

Quote from TheMasterCaver»

I'm fairly certain that duplicate damage enchantments do add together, at least I've seen YouTubers playing with weapons with duplicate Sharpness enchantments on a sword and it appeared to deal more damage than one enchantment by itself (mods like Damage Indicators make this easy to see). This also appears to work for Unbreaking, and you can use commands/NBT editing to put Smite and Sharpness on one weapon and they will both add damage. In a similar manner if you have Thorns on several pieces of armor each piece has a chance of applying damage and this probably applies to a single piece as well.

Here is some code that appears to iterate over the entire list of enchantments on an item and applies modifiers for each one:

/**
 * Return the (magic) extra damage of the enchantments on player equipped item.
 */
public static float getEnchantmentModifierLiving(EntityLivingBase par0EntityLivingBase, EntityLivingBase par1EntityLivingBase)
{
    enchantmentModifierLiving.livingModifier = 0.0F;
    enchantmentModifierLiving.entityLiving = par1EntityLivingBase;
    applyEnchantmentModifier(enchantmentModifierLiving, par0EntityLivingBase.getHeldItem());
    return enchantmentModifierLiving.livingModifier;
}


/**
 * Executes the enchantment modifier on the ItemStack passed.
 */
private static void applyEnchantmentModifier(IEnchantmentModifier par0IEnchantmentModifier, ItemStack par1ItemStack)
{
    if (par1ItemStack != null)
    {
        NBTTagList var2 = par1ItemStack.getEnchantmentTagList();

        if (var2 != null)
        {
            for (int var3 = 0; var3 < var2.tagCount(); ++var3)
            {
                short var4 = ((NBTTagCompound)var2.tagAt(var3)).getShort("id");
                short var5 = ((NBTTagCompound)var2.tagAt(var3)).getShort("lvl");

                if (Enchantment.enchantmentsList[var4] != null)
                {
                    par0IEnchantmentModifier.calculateModifier(Enchantment.enchantmentsList[var4], var5);
                }
            }
        }
    }
}

Also, if they do add together two Power I enchantments would be equivalent to Power III since Power I adds 1 to the damage modifier of an arrow, while higher levels only add an additional 0.5, just as Sharpness does (Sharpness I = +1, Sharpness V = +3, Sharpness/Power III = 0.5 + 0.5 * 3 = 2. In the case of arrows this doubles their damage since their base damage is 2 prior to accounting for velocity and a critical modifier).