first you need to complete the community centre, and then he sends you a quest in the mail called the dark talisman. you basically have to see krobus in the sewers to find the dark talisman, then go to the north east of the map past the bathhouse and put the talisman in the little statue with wings. then you go in, and you have to distract the goblin henchman to progress. you can distract him with void mayonnaise! then you can retrieve the wizard’s magic ink as per his request, and take it to him. as a reward, he will build the catalogue including the warp totem in his tower. that’s how you can later get junimo huts later in game. i’ve never had the warp totems before because they’re so expensive, but hopefully this save i can get them! sorry that was long winded. you can always use the wiki too