Users who used “Dormant Runes” in previous iterations of the Prestige Perks system have had the Runes automatically returned to their inventory. Dormant Runes are no longer usable for purchasing extra Prestige Perks.
Lunar Shards and Celestial Runes are earnable from some quests! There is a ~3-5% chance of them appearing in a Hard Quest per reroll, and this chance is greatly boosted in Extreme Quests. Campaigns will always provide a reliable way to earn these as well.