The First King

The Artifact of the First King is the first Modern Artifact created by the Great Kings. It is currently in possession of the King of Tsunia.

Appearance
No idea lmao but it matches with the Artifact of the Second King. Half of a crown, most likely.

Resource
All of the Flow drained by the Artifact is converted into "Resource" at a 1:1 ratio. All of the First King's abilities use Resource, and only it. Resource cannot be converted into Flow. Flow in the environment and from other people cannot be converted into Resource. The First King has Infinite Range. Doing things from further away drains additional Resource. When the Artifact is no longer in use, all Resource will be converted back into Flow.

Construction/Deconstruction
Resource can transmuted into any Element of the periodic table the user wishes. Inversely, Elements in the User's range can be transmuted into Resource. Resource cannot be converted into anything Organic. Organic Items cannot be converted into Resource. The First King can also instantly convert Elements into another Element (this will increase/decrease the amount of Element you're left with depending on the cost difference of the two Elements)

I'm gonna make a little table for how much Resource is required to Construct Elements, and how much Resource you'll get for Deconstructing Elements. Later.

Placement Preview
The First King allows the user to choose how Elements are Transmuted. The user simply has to think about the variables (which are location, shape, size, atomic structure, and physical state), and The Frist King will give the user a transparent preview of what the Transmuted Element will do. If the User is happy with the results, The First King will act accordingly, make the entire preview flash a few times, and go ahead with the Transmutation. You have no control over what happens after you Transmute your Resource into an Element. This isn't the Flow System.

Items
If it exists, and it's not a pure Element, it's classified as an "Item" in the eyes of The First King. The amount of Resource required to construct/deconstruct Items is the same as the amount it would take to do the same to each individual Element. Everything that can be done with singular Elements can be done with items for the same resource cost.

Permanence
Elements and Items that are Constructed and Deconstructed during The First King's use will remain as such. This is kind of a bad thing.

Cool things you could probably do with it
Intelligent use of The First King will allow it's user to make the most out of any situation.

If there are no civilians to worry about, The First King could terraform any sort of environment into a field that's totally suited to the user's strengths. Deconstruct anything that's in the way, then construct anything that might help you.

Creating hazards of it's own is another way in which The First King is an especially dangerous Artifact to be caught in a fight with. Do you know how easy it would be to convert the floor into liquid tungsten, i.e a liquid HALF AS HOT AS THE SUN.

Seriously, you don't get it. Chemicals are dangerous. A LOT of Chemicals are dangerous. If you've got an Artifact that can freely create Elements out of thin air and turn existing ones into others? You're in danger. Big danger.

Anyone using The First King would also technically be able to survive in space. Surround yourself in your own resource, then Construct it into Air. But this'd only last until you run out of Flow to convert into Resource. Surviving underwater is also an easy feat with the same principle.

Using one's own resource to surround oneself with armor of steel.

Has Synergy with the Sand Delta. All materials are at their disposal.

Ways to Kill People
This is gonna be a pretty long list. So I'm not even gonna. Think of anything that's even remotely lethal to a human. Surround your opponent with it. EZ win.

The First King can create Pallobalt. Construct your Resource into Pallobalt dust to make the air a toxic atmosphere. Use your own Resource to create fresh air to make sure you're unaffected..

Turning the sky into liquid tungsten. Lava falling from the sky.

Limitations
Money is not creatable. All of your Flow will be drained if this is attempted.

The First King leaves you vulnerable to the Flow System though. A teammate that can negate Magic Attacks and direct Flow from the environment into your body and having you turn all of it into Resource is one of the only counters to this.

History
The Great Kings had ran out of enemies (and friends) to murder and turn into weapons. Then they wondered if they could make weapons out of their own Magic Systems, so that Shuichi can use Shuji's and vice versa. Obviously, they weren't going to kill each other for this sake, but it probably wasn't even going to be necessary. It's their Magic Systems, they know them back to front. It was never going to be that hard to replicate them in the first place.

Trivia
There isn't much trivia here though.