How can I add a weapon to the basic weapon table?

The 5e system is ment to be simple so choose the closest weapon to the one you want from the table. 

E.g. using a boat oar as a weapon (flavour wise) you could say that it has the stats of a great club, a machete you could use the short sword stats ect.

The basic weapon table, as you put it, is just part of the online rules. You won't be adding anything to that. To make a new weapon available on your character sheet, you have to create it in Homebrew options. 

Quote from Bluesman3535 >>

How can I add a weapon to the basic weapon table?

 Currently you cannot. WotC (the company that publishes D&D) has an official rule in the DMG for “new weapons.” The rule is basically “use a preexisting weapon and just change the name.” Because of that, WotC had forbidden DDB from allowing us to create custom nonmagical equipment. They recently rescinded that mandate. We now just have to wait for DDB to finish the massive systemwide update schedule that is currently ongoing that will allow them to build a tool for that so we can use it. Don’t hold your breath, it will probably take a while. I don’t expect it before next year, but nobody really knows for sure how long it will take.

IamSposta, haven't people just been using the magic item Homebrew to make mundane items by labeling them Common?

Quote from Wtfdndad >>

IamSposta, haven't people just been using the magic item Homebrew to make mundane items by labeling them Common?

 By labeling them “common” you are designating them as “common magic items,” not as “nonmagical.” On the character sheet under “manage equipment” if you check the “common” box, it shows nonmagical items, but they should really rename it to “nonmagical” or “mundane” as opposed to common because that word means two different things depending on if you are in the homebrewer or the character sheet.

PS- In fact, if you take a weapon and just change the name and description and publish it the Devs/Mods will deny your publication because “The Magic Item creator is not meant to expand the list of mundane items.” (Paraphrased) That happened when I reskinned a Rapier to do slashing damage and called it a Saber. I had to add a +1 magic bonus and resubmit it to get around that restriction.

So, after that, did you just go to the Customization tab on the weapon and just give it a -1 to hit and damage to take the +1 qualities back out?

I forgot to ask, how did you change the damage type from piercing to slashing? I figured it out, it takes forever for the changes to update for me, leading me to believing I was doing something wrong.

 

PS- In fact, if you take a weapon and just change the name and description and publish it the Devs/Mods will deny your publication because “The Magic Item creator is not meant to expand the list of mundane items.” (Paraphrased) That happened when I reskinned a Rapier to do slashing damage and called it a Saber. I had to add a +1 magic bonus and resubmit it to get around that restriction.

 You don't need to publish anything if it's just for personal use or those involved in your campaigns. 

Ok. Thanks. The weapon I was trying to create was a special longbow that can be  used in melee.  It deals d10:damage and is a finesse weapon so there’s nothing I can copy.   The weapon will go to a level 11 arcane archer Aarakokra.  The campaign will be wrapping up soon everyone is getting something cool as they head into the final stretch.  Here’s the full description 

You have a +2 bonus to attack and damage rolls made with this magic weapon. 

The bow also grants proficiency in DEX ST.   

Also, the bow can be wielded as a +2 melee weapon with the finesse property that deals d10 (+2 for magic) damage.  When used in melee, the bow has spikes at the top and bottom of the bow, handgrips near the ends, and protruding crescent shaped blades that extrude horizontally from the stock of the bow so they can inflict slashing damage when the weapon is used like a 2 handed Klingon battle staff, or piercing damage when jabbed like a spear.  

The bow responds to these command words, spoken in Elvish, which takes a bonus action.:

1 - String thyself  - causes a bowstring to appear     2 - String be gone - causes the bowstring to disappear     3 - Engage for battle - causes the bowstring to disappear (if it currently exists), the end points to sharpen, the crescent blades to extrude

The bow is fashioned using wood from a Sildar tree.  It looks like silver colored wood, with grain and knots, but has a harder draw.  From a distance, it easily be mistaken for steel.  

Proficiency with a longbow allows you to add your proficiency bonus to the attack roll for any attack you make with it.

It should be totally fine because you are creating a magic weapon.

Quote from Wtfdndad >>

 

PS- In fact, if you take a weapon and just change the name and description and publish it the Devs/Mods will deny your publication because “The Magic Item creator is not meant to expand the list of mundane items.” (Paraphrased) That happened when I reskinned a Rapier to do slashing damage and called it a Saber. I had to add a +1 magic bonus and resubmit it to get around that restriction.

 You don't need to publish anything if it's just for personal use or those involved in your campaigns. 

 I am 1,000% aware of that, thank you. I am usually one of the folks who explains that kind of stuff for other users. In that particular instance I was conducting personal experimental research to test the limits and capabilities of the homebrewer. I wanted to see what would happen, and then I wanted to see if I could overcome the limitation.

If I recall, in one of the Adventures (don’t ask me which one) there is an existing magic item that can transition from a Longbow to a Quarterstaff. I don’t remember what it is called, but that might be a place to start.

Quote from IamSposta >>

If I recall, in one of the Adventures (don’t ask me which one) there is an existing magic item that can transition from a Longbow to a Quarterstaff. I don’t remember what it is called, but that might be a place to start.

 I have been looking for this for about 2 months.  It is in none of my 3e source books and web searches bring up nothing that is appropriate for D&D.  Was just planning on having a magic item that could go from longbow to quarterstaff using a bonus action.

And I still have mixed feelings on re-skinning an existing weapon for all new weapons.  Makes it simple, but doing anything really new would not work.  The stiletto for example.  Damage wise it is just a re-skinned dagger.  The really good thing with it was internal organ damage with much smaller entry wound.  D&D 3.5e you could have a higher critical on it which you can no longer do in 5e.  They made it simpler by taking away options.

I'm not seeing a problem especially with a long bow to staff.

Using two hands, they both do the same damage. 

Quote from Motman >>

The stiletto for example. Damage wise it is just a re-skinned dagger. The really good thing with it was internal organ damage with much smaller entry wound.

 Actually it was designed to put the maximum amount of force to the smallest possible point in order to easily pinch through armor that would deflect or catch other weapons of that size. It was excellent as an assassin’s tool not because it was any killier than other daggers, but because other daggers couldn’t punch through, and anything larger and heavier would have been too conspicuous.

To be clear, a larger dagger with a broader blade is actually more likely to do serious internal injury because the combination of larger surface area and a cutting edge would make missing the important stuff far less likely. Plus, the bigger the wound, the faster the blood loss, which is a good thing. Having you victim take a week to die from sepsis caused by a pinhole wound to the bowl is the mark of an amateur. Having the victim die from rapid blood loss In under a minute is much better. Even a nick to an artery in the right spot will result in blood loss so rapidly that unles they were already in a fully staffed ER when they were stabbed.

I couldn’t find a weapon that was d10 and had the finesse property.  That’s important because the characters are in dndbeyond and I want the attack actions to be accurate. 

Quote from Bluesman3535 >>

I couldn’t find a weapon that was d10 and had the finesse property.  That’s important because the characters are in dndbeyond and I want the attack actions to be accurate. 

 Take any 1d10 weapon you like and give it the modifier to add the finesse property.

Modifier: Weapon Property->Subtype: Finesse.

Would D&DBeyond ever make a Homebrew section dedicated for making non-magical items? Rather than you having to make the item in the 'Make A Magic Item' section.

Quote from Stormknight >>

There are a couple of other tricks that you can use too:

1. You can create multiple magic items, each of which represents one "form" of the weapon. This way you get the attacks shown correctly on the character sheet.

2. You can customise equipment and actions directly on the character sheet.

 #1 is exactly what I do.  Created a non-magical Gnomish Combow (sorry) that combines a bow with a spear-like slashing blade.  Created a main item for bow, description and properties, and then a second for the blade.  Each is listed as a separate attack action with associated bonuses and damages.