Game concept

Commission Epic

The game also links it as Commission Epic Decision.

From the game's encyclopedia

A Decision that lets a character trade Gold for an Artifact, by commissioning a family epic.

The epic will give Renown and can give also give other bonuses depending on your choices.

The game's text for patch 1.20.1.2. Words in blue are entries of the encyclopedia: hover one to read it, as in the game.

Commission Epic is an entry of Crusader Kings III's in-game encyclopedia. The game explains it: "A Decision that lets a character trade Gold for an Artifact, by commissioning a family epic." It is part of Decision. It covers Exceptional Epic. The game also links it as Commission Epic Decision. Patch 1.20.1.2, from game/common/game_concepts/00_game_concepts.txt and game/localization/english/game_concepts_l_english.yml.

for a guide, post or blog

Source: game/common/game_concepts/00_game_concepts.txt, game/localization/english/game_concepts_l_english.yml and the English localisation, Crusader Kings III 1.20.1.2.