Beautiful Dreamer, Aerial Drive, Celebrate Memories
AD and BD were event CEs and I don’t believe they are available anymore. Don’t know about Celebrate Memories though.
As Aard said, you can’t get either ad or beautiful dreamer anymore, they’re gone forever. The last ce you mentioned comes in a year from now, for 5th anni
Valentines CE’s have ended up in the rare prism shop before, so beautiful dreamer has a chance that way… (I don’t play jp and don’t know for sure). But it’d be 25 rps if it does and I don’t know if it’s good enough to warrant that much, especially if F2P.
Sadly even if the Mecha-Eli event did come back via the Main Interlude system, I don’t think Aerial Drive would return with it. Never heard anything about the CEs for Underworld Christmas or SERAPH being available via theirs, just the welfares.