How do you get Sword of Gujian with the console?

effect create_artifact_sword_goujian_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 Gujian?

They get Prestige +0.2/month, Court grandeur baseline +3 instead.

Court artifact · Pedestal Item

Sword of Gujian

IllustriousUnique

Sword of Gujian is an illustrious pedestal item artifact in Crusader Kings III: Court grandeur baseline +4, Monthly Renown +2%, Renown +0.1/month, Han Opinion +5. Quality 100 and wealth 100; maximum durability 150, and it does not wear out. Patch 1.20.0.3, from game/common/scripted_effects/01_exp1_historical_artifacts_creation_effect.txt.

Quick answers (3)

What does Sword of Gujian do in CK3?: Court grandeur baseline +4, Monthly Renown +2%, Renown +0.1/month, Han Opinion +5 (patch 1.20.0.3).
How do you get Sword of Gujian with the console?: effect create_artifact_sword_goujian_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 Gujian?: They get Prestige +0.2/month, Court grandeur baseline +3 instead.

This ancient sword is said to have once belonged to the King of Yue, Goujian. While old fashioned in its design the sword shows excellent craftsmanship. Gilded text in bird-worm seal script is visible near the hilt.

Effects

Court grandeur baseline+4
Monthly Renown+2%
Renown+0.1/month
Han Opinion+5

For an owner who can't benefit from it

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

Prestige+0.2/month
Court grandeur baseline+3

Who can benefit (can_benefit) (1 line of game script)

government_has_flag = government_has_merit

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

History and who has it

Made before recorded history.

How it is made

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

effect create_artifact_sword_goujian_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 (goujian_sword_modifier), common/artifacts/templates (sword_goujian_template) and the English localisation, Crusader Kings III 1.20.0.3.