(Note: if you happen to see an active obelisk before you've spoken to Pikkupstix about it, you can go ahead and talk to Pikkenmix and enter the spirit plane.) Familiarisation has no requirements, not even the Wolf Whistle quest which is an introduction to Summoning. However it would be of benefit to complete the quests Fishing Contest, Underground Pass, Heroes' Quest, Lost City, and partial completion of Lunar Diplomacy and Eadgar's Ruse. These quests grant access to a greater number of Summoning obelisks, any of which could become the next active obelisk.