- defeat Grant X
- get the cookies from the doghouse at Horace's in Feasterra [requires finished Horace affinity #3]
- give the cookies to Karen (scarecrow) during the day behind Robin's house and you will get a key
- use the key on the last door in the Glory Dungeon's bathroom at night and get the lens extractor
- interact with Grant's telescope on the balcony (it should break)
- use the lens extractor on the telescopes on the wall in Grant's room, you will get a lens
- use the lens on the telescope in Ghart's house at night to find the secret location
- open the main Helgem Earth map and go to ??? at night
- interact with the dragon sword, you will be prompted to wake Dodoro the dragon
- choose "yes, great idea" to all the options.
3 opponents are encountered in this quest (the battles are in badass mode):
- Horace's Clone while getting the cookies in Feasterra
- Orc (Red) while getting the lens extractor in the Glory Dungeon bathroom
- The Infernal Trio while getting a lens from Grant's telescope collection in his room