Dragonfang

The Dragonfangs were legendary blades held by the host of Valkyries, powerful female Asgardian warriors. There are only 40 known swords in existence, most located in the dimension of Hel, where Hela massacred the heavenly host.

Passive
God-Killer: This weapon ignores all immunities and resistances to physical and a single type of damage (Radiant)

Power Immune: The artifact is immune to all effects and powers not cast by the wielder. This doesn't extend immunity to the wielder. It cannot be broken, transported (seperately from the wielder), or altered by an opponent.

Rending: Should the artifact or weapon not have the 'Power Immune' passive ability, this artifact can cut through it, ignoring resistances and immunities and decreases AC by 1 for every attack. If targeting a weapon, the user must succeed on a DC 15 save to not have their weapon broken.

Barrier-Render: This artifact can be used to target magical barriers. When targeting a magical barrier (Antimagic Field, Zone of Deception), the caster must make a Wisdom save for that barrier not to be dispelled.

Magic Conduit: Magic may be cast through the artifact instead of a normal focus.