User blog comment:B214/Question and Answers 6/@comment-190.164.227.239-20161201033222/@comment-29963364-20161205181101

I think the criteria for a Longinus if more like this:

A Sacred Gear evolves to the point that it makes it's user able to do things only Gods or God-Class beings should be able to do. Whether that be...

* Possess power on-par or surpassing God-Class beings.

-- Boosted Gear (possesses Ddraig, a Heavenly Dragon)

-- Divine Dividing (possesses Albion, a Heavenly Dragon)

* Potential to "Destroy" the World.

-- True Longinus (it's Truth Idea can "control destiny" to some extent)

-- Zenith Tempest (complete controle over the weather and all natural elements)

-- Dimension Lost (uses mist to manipulate space and create entire dimensions)

-- Annihilation Maker (creates monsters that can have hax abilities)

* Control Time and Space.

-- Dimension Lost (controls space)

-- Forbbiden Balor View (stops time) - [This Sacred Gear isn't a Longinus, but has the potential to be considered one]

* Control Life itself.

-- Sephiroth Graal (can literally bring back the dead, mass-produce beings down to the soul, with some limitations, can give beings immunity to their weaknesses, and make them virtually immortal)

All of these Sacred Gears have not yet proven they can kill Gods, but they give the user abilities that make Gods practically obsolete. Which is, in a way, "killing" Gods.