According to the Wiki, Dragon Slayer Magic is a form of lost magic. We know that Ultear was able to learn a form of lost magic called "Arc of Time" from Hades.

However, we know that there are currently two ways you can obtain Dragon Slayer Magic:

• Learn it from an actual Dragon.
• Implement a Dragon Lacrima into your body.

Therefore, I would say yes, there might be a third way to teach someone Dragon Slayer Magic.

According to the Wiki, Dragon Slayer Magic is a form of lost magic. We know that Ultear was able to learn a form of lost magic called "Arc of Time" from Hades.

However, we know that there are currently two ways you can obtain Dragon Slayer Magic:

• Learn it from an actual Dragon.
• Implement a Dragon Lacrima into your body.

Therefore, I would say yes, this might be a third way to teach someone Dragon Slayer Magic.

According to the Wiki Dragon Slayer Magic is a form of lost magic. We know that Ultear was able to learn a form of lost magic called "Arc of Time" from Hades.

However, we know that there are currently two ways you can obtain Dragon Slayer Magic:

• Learn it from an actual Dragon.
• Implement a Dragon Lacrima into your body.

Therefor I would say yes, this might be a third way to learn someone Dragon Slayer Magic.

According to the Wiki, Dragon Slayer Magic is a form of lost magic. We know that Ultear was able to learn a form of lost magic called "Arc of Time" from Hades.

However, we know that there are currently two ways you can obtain Dragon Slayer Magic:

• Learn it from an actual Dragon.
• Implement a Dragon Lacrima into your body.

Therefore, I would say yes, there might be a third way to teach someone Dragon Slayer Magic.