Rumor has it that Demon Invitations are dropping from the monsters of Pandemonum!

It's a little shredded but it's not beyond restoration. ● Event Period: From 09:00 Jan 24 ~ Feb 21 (UTC) HOW TO PARTICIPATE

Shredded Invitations drop from Pandemonium/Luke(Normal) dungeons. More invitations drop during the weekends. (Sat 09:00 ~ Mon 08:59 (UTC))

You can purchase Restored Demon Invitations through Cindy in Seria's Room. Cindy can only be found in Seria's Room of Pandemonium area.