Now we’re happy to announce that when legendary relics become available, any player who has already crafted at least one legendary rune will be granted a legendary relic for free. In other words, you’ll get 100% of legendary relic progress as a bonus for having already crafted a rune. When the release that contains legendary relics goes live, the eligibility period will end, and the only way to obtain a legendary relic will be through the normal crafting journey.
https://www.guildwars2.com/en/news/legendary-relics-are-coming-soon/