General Zod, Lyta-Zod and others in “Unfinished Business”

According to the archive, we find that symbol, we find the weapon.

Lyta-Zod

It looks like a house sigil.

It doesn't match any house currently on Krypton. [Seg takes it back] You recognize it. All you have to do is take me there.

Adam Strange

Seg, you can't...

Seg-El

Shut up. You'll have your turn. The people who live down here, the Cythonnites. This weapon is what they're sworn to protect, isn't it?

Yes, and they will guard it with their lives. Because that is how powerful it is. Which is why we need it.