Golden Vajra (金色のヴァジュラ) is a unique Aragami appearing only in the 1.40 update's Brilliant Divinity (煥然たる神威) and Nirvana Trail survival missions of God Eater 2, as well as select survival missions in God Eater 2 Rage Burst.
The following information is taken from the official in-game descriptions of the Aragami found in the NORN Terminal's database.
God Eater 2 Rage Burst
A giant Aragami born from the mutation of a Vajra. Its name comes from the color of its body. It moves with an uncanny speed for its size, being faster than the standard Vajra. Its delayed attack with slow-guided Oracle are extremely strong.
The Golden Vajra is truly immense, comparable in size to an Ouroboros.
Although it moves considerably faster and hits harder than a normal Vajra, it is still a Vajra at its core and thus is predictable and can be goaded much like its normal counterpart. Its electric attack size variant differs from the original and is relatively simple to dodge. However, upon entering Enraged status, it receives an enormous boost in movement and attack speed.