I think that's a bit powerful for 1 point, otherwise he can shatter the equivalent of an Item of Power with Mythic Toughness.  I would say that it does 2 extra points of damage only versus a target in armor or using a shield, and the damage bonus applies even if the target is the shield or armor itself.  That's powerful enough to "negate" the effects of a mundane shield and still effective enough to reduce the effectiveness of any high powered armor or shield.

TRACING [-2]
Description: You have the ability to project weapons from your mind into reality.
Skills Affected: Craftsmanship, Weapons, Guns
Effects:
Projection. With a supplemental action, you may create a melee or thown weapon out of thin air. Two-handed melee weapons created this way are capped at weapon rating 3, while thrown weapons and one-handed melee weapons are capped at weapon rating 2. Weapons created this way last until the end of the scene or until you make a new weapon.
Reinforcement. By spending a scene and making a successful Craftsmanship roll, you may cause your projected weapon to become fully real. This means that it lasts indefinitely.

Versatile Tracing [-1]. You may create simple objects other than melee weapons with this power. Armour, simple tools, keys, and levers are all possible.

Complex Tracing [-2]. (Requires Versatile Tracing) You may create complex objects with this power. Firearms, explosives, chemicals, and machines are all possible, although at the GM's discretion a Craftsmanship roll may be required for certain items. Explosives, firearms, and two-handed melee weapons are now capped at weapon rating 5, while thrown weapons and one-handed melee weapons are now capped at weapon rating 4.

This power and every weapon has an aspect related to demon catch attached to it?

That sounds like regular enchanted items with, maybe, Soulfire as the source so that it reduces toughness or acts as a catch for demons.  I'm not sure how he could 'teach' it to others, though.  That could be its own power - or it could just be a potion slot that he checks off his character sheet for others to declare later...  Getting that ability permanently just sounds like having him teach it to you is a narrative justification to spend refresh on Holy Touch.