First off, you'll need to unlock every dragon card, these cards are:Dragon Ring
- Already ownedDragon Claws
- unlocked by "Petward Monk"Dragon Helm
- unlocked by "Petward Monk"Dragon Shield
- unlocked by "Petward Monk"Dragon Breath (artefact)
- unlocked by "Petward Monk"Dragon Tongue (sword)
- unlocked by "Petward Monk"Dragon Armour
- unlocked by "Petward Monk"
In order to get the "Petward Monk" encounter, you have to start from "The Tavern" encounter. In the spoiler below is the whole progression to get to that point:
For this achievement I tried Endless, but it took forever to get even half of the dragon relics (potentially due to awful luck, but moving on). So I recommend playing King of Plagues on Adventurer
difficulty (IT WILL NOT UNLOCK ON APPRENTICE)
with this setup:
While playing, focus on stopping at every shop and don't be afraid to backtrack and hit a shop twice. If you see the Mage's Shop, then you have to stop there until you get the Dragon Ring because that's the only shop that it appears in. Everything else should appear in all the other shops/tinkerers (besides Healer and Priest shops since they don't sell items). If you make it to the floor exit before stopping everywhere, pay attention to what your "Ring of Hindsight" is revealing and backtrack if necessary.
Also pay attention to what cards are being discarded; for example if you landed on "twisted canyon" and got to draw your weapon but it was on the bottom of the deck, the game would discard every card picked before it picked the sword. That would make it so you'd have to wait until your equipment deck was reshuffled before you'd draw the necessary dragon relics from 'gain equipment' cards. If early enough, it might be worth it to forfeit and restart the King of Plagues.
A little bit of luck and patience is necessary. Quit to the dashboard and quit the game to restart it if you ever fail an encounter, die or just want to reload the shops for a better chance at getting the equipment you need. Each run through shouldn't take very long, especially if you skip/breeze past most encounters.
*Updated High Priestess Card to 6 blessings, not 4.