Artifacts of Genesis

The artifacts of Genesis are weapons or tools that were created and designed by Sentient Genesis for an unknown purpose.

The ones holding the Power of the Royal (aka Regalia users) can use these weapons to boost a transformation alike to Noctis's "Armiger".

The exact number of them is unknown.

The first
???

Aegis
Excellion's Aegis is a beam blade said to have the power to "make whatever you imagine real" in its original form. Excellion usually uses a toned down version of this power.

By the way, it's bigger than it looks probably as big if not bigger than a person in fact.

Aegis II
A beam blade said to be able to erase anything from reality in its original form. It is currently wielded by Kosmos.

Like the Monado, it has Monado Arts.

Monado
The Monado is a beam blade that controls the very ether that makes up the world. It has a set of Monado Arts. Currently owned by Shiro.

Crucible
Originally owned by the fourth Regalia wielder (and subsequently now Excellion), this artifact lies somewhere within the flowering field below the Sea of Souls. It is currently maintained by the Guardian, though Excellion can request it at any time, he barely ever uses it at the moment, as it's a dead giveaway of a chunk of his identity.

The lance of Longinus
The lance of Longinus is a lance untouched by energy, any kind of energy will circumvent the item and its user. It's one of the few weapons capable of piercing AT fields. It is in the possession of Excellion.

The lance of Cassius
The lance of Cassius is a counterpart to the lance of Longinus, it's in possession of The Composer. This one seems to attract and redirect energy, and it is the only other weapon shown to be able to pierce AT fields.

Voder
The Voder is a gun, it seems to be able to shoot black bullets that are completely unaffected by anything magic, ether, or septima. It's currently in possession of Excellion. It outright does not make sense how it does these effects, and it probably wasn't made to make sense.

The Akashic Records
A mysterious book that contains information on everything and anything that will ever happen on every universe down to the tiniest particle. It is currently kept by Excellion. It's unknown where all the information in the book actually comes from.

Öarachi, the Clarent Decider
A blade with control over life and death. Previously wielded by Tael it was given back to Excellion.