Burial Blade and Blades of Mercy

So I did a bit of research into scaling, after starting a Blades of Mercy run in Bloodborne, and now I'm a little confused.

Firstly, the Stats page, when looking at Arcane stat states (emphasis mine):

Despite all trick weapons have an arcane scaling, investing in arcane does nothing to increase these weapons' physical damages. Instead this value project how high its elemental damage would be if it was infused with elemental Blood Gems.

Yet when looking at the Burial Blade or Blades of Mercy (emphasis mine):

Blades of Mercy:

This weapon has many similarities to the Burial Blade.
Both weapons have a direct scaling with arcane towards their damage outputs.

Burial Blade:

This weapon shares many similarities with the Blade of Mercy
Both weapons innately scale with Arcane.

Should I be investing in Arcane, if I want to deal more damage with the Blades of Mercy?

bloodborne

Pictures about "Burial Blade and Blades of Mercy"

Burial Blade and Blades of Mercy - Green Grass in Close Up Photography

Burial Blade and Blades of Mercy - Samurai with Katana

Burial Blade and Blades of Mercy - Samurai with Katana in Black and White

What is the blade of mercy?

The Blade of Mercy is a Trick Weapons in Bloodborne, that takes on the form of an short blade that can transform into twin daggers.

Is the burial blade a good weapon?

I absolutely love Scythes and I wish there were more of them in video games but sadly there aren't. The Burial Blade however, is the best Scythe weapon I've ever seen in any video game.

Is the blade of Mercy a good weapon?

This weapon has many similarities to the Burial Blade. Both weapons have a direct scaling with arcane towards their damage outputs.

Bloodborne PVP Compilation, Skill Build BurialBlade / Blades of Mercy

Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.

Images: Expect Best, ROCKETMANN TEAM, Azis Js, Azis Js