How do you get Derafsh Kaviani with the console?

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

Court artifact · Large Wall Ornament

Derafsh Kaviani

IllustriousUniqueThe Royal Court

Derafsh Kaviani is an illustrious large wall ornament artifact in Crusader Kings III: Court grandeur baseline +3, Renown +0.04/month, Prestige +0.25/month, Popular Opinion +5, Same heritage county advantage +4, Persian Opinion +5. Quality 100 and wealth 100; maximum durability 150, and it does not wear out. At game start it goes to the holder of Makran (starts before 1000.1.1) — 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 Derafsh Kaviani do in CK3?: Court grandeur baseline +3, Renown +0.04/month, Prestige +0.25/month, Popular Opinion +5, Same heritage county advantage +4, Persian Opinion +5 (patch 1.20.0.3).
How do you get Derafsh Kaviani with the console?: effect create_artifact_wall_banner_kaviani_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 Derafsh Kaviani?: They get Court grandeur baseline +3, Renown +0.04/month, Prestige +0.25/month instead.

This is the legendary Derafsh Kaviani — the royal standard of the fallen Sassanid Empire. A symbol of identity and pride for the heirs of the Empire of Persia.

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:

Court grandeur baseline+3
Renown+0.04/month
Prestige+0.25/month

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

culture = {
	has_cultural_pillar = heritage_iranian
}

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

History and who has it

Made before recorded history.
At game start: the holder of Makran (starts before 1000.1.1) — needs The Royal Court.

How it is made

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

effect create_artifact_wall_banner_kaviani_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 (banner_kaviani_modifier), common/artifacts/templates (kaviani_template) and the English localisation, Crusader Kings III 1.20.0.3.