How do you get Heirloom Seal with the console?

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

Court artifact · Pedestal Item

Heirloom Seal

IllustriousUniqueAll Under Heaven

Heirloom Seal is an illustrious pedestal item artifact in Crusader Kings III: Domain Taxes +5%, Character capital county monthly development growth +0.1/month, Han Opinion +5, Court grandeur baseline +6, Prestige per Legitimacy Level +0.15/month, Piety per Legitimacy Level +0.15/month and 1 more. Quality 100 and wealth 100; maximum durability 150. At game start it goes to the holder of China (starts before 940.1.1) — needs All Under Heaven. It needs All Under Heaven. Patch 1.20.0.3, from game/common/scripted_effects/01_exp1_historical_artifacts_creation_effect.txt.

Quick answers (2)

What does Heirloom Seal do in CK3?: Domain Taxes +5%, Character capital county monthly development growth +0.1/month, Han Opinion +5, Court grandeur baseline +6, Prestige per Legitimacy Level +0.15/month, Piety per Legitimacy Level +0.15/month, Influence +0.3/month (patch 1.20.0.3).
How do you get Heirloom Seal with the console?: effect create_artifact_heirloom_seal_effect = { OWNER = root } — runs the scripted effect that makes it, for the character you play (debug mode).

This ancient seal in Jade was created by Qin Shi Huang over a millennia ago after the unification of the warring states of China. The seal is said to have been carved out of the Heshibi, one of the most sacred imperial treasures that ever existed. The inscription reads: "Having received the Mandate of Heaven, may the emperor lead a long and prosperous life."

Effects

Domain Taxes+5%
Character capital county monthly development growth+0.1/month
Han Opinion+5
Court grandeur baseline+6
Prestige per Legitimacy Level+0.15/month
Piety per Legitimacy Level+0.15/month
Influence+0.3/month

History and who has it

Kept with the title China from 1.1.1.
At game start: the holder of China (starts before 940.1.1) — needs All Under Heaven.

How it is made

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

effect create_artifact_heirloom_seal_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 (heirloom_seal_modifier), common/artifacts/templates (general_unique_template) and the English localisation, Crusader Kings III 1.20.0.3.