How do you get Sword of God with the console?

effect create_artifact_wall_sword_attila_effect = { OWNER = root } — runs the scripted effect that makes it, for the character you play (debug mode).

What if the owner can't benefit from Sword of God?

They get Court grandeur baseline +4, Natural Dread +5 instead.

Court artifact · Pedestal Item

Sword of God

IllustriousUniqueThe Royal Court

Sword of God is an illustrious pedestal item artifact in Crusader Kings III: Court grandeur baseline +4, Renown +0.1/month, Natural Dread +15, Prestige per Dread +0.02/month. Quality 100 and wealth 100; maximum durability 150, and it does not wear out. At game start it goes to the holder of Bavaria (starts from 1064.1.1) — needs The Royal Court. It needs The Royal Court. Patch 1.20.0.3, from game/common/scripted_effects/01_exp1_historical_artifacts_creation_effect.txt.

Quick answers (3)

What does Sword of God do in CK3?: Court grandeur baseline +4, Renown +0.1/month, Natural Dread +15, Prestige per Dread +0.02/month (patch 1.20.0.3).
How do you get Sword of God with the console?: effect create_artifact_wall_sword_attila_effect = { OWNER = root } — runs the scripted effect that makes it, for the character you play (debug mode).
What if the owner can't benefit from Sword of God?: They get Court grandeur baseline +4, Natural Dread +5 instead.

The legendary sword of the Hun chief Attila, the Scourge of God. Also known as the Sword of Mars.

Effects

For an owner who can't benefit from it

The template gives these instead of the effects above when its “can benefit” check fails:

Who can benefit (can_benefit) (3 lines of game script)

unreformed_or_syncretic_with_unreformed_trigger = {
	CHARACTER = root
}

As written in game/common/artifacts/templates (attila_template).

History and who has it

Made before recorded history.
At game start: the holder of Bavaria (starts from 1064.1.1) — needs The Royal Court.

How it is made

The game creates it with the scripted effect create_artifact_wall_sword_attila_effect. In the console (how to open it), this gives it to the character you play:

effect create_artifact_wall_sword_attila_effect = { OWNER = root }

Built from the effect's file; not run in the game by us.

Source: game/common/scripted_effects/01_exp1_historical_artifacts_creation_effect.txt, common/modifiers (attila_sword_modifier), common/artifacts/templates (attila_template) and the English localisation, Crusader Kings III 1.20.0.3.