When naturally occurring, Prophecies have little to no warning as will come on suddenly, out of nowhere. However whether naturally occurring or induced via blood ritual, physical manifestation appears the same — appearing much like how Seers have Prophecies within the Harry Potter Universe, albeit with some bonus spooky body horror.
Luna would go stiff as a board and fall from wherever she stands, she will exhibit seizure-like symptoms for a short period, her eyes clouding over with white. Prophecies will be spoken in vague or cryptic descriptions, that have varying degrees of difficulty in terms of understanding. She speaks in a voice not her own, but a cacophonous chorus. She will be completely unresponsive during this time.
The whole ordeal would be over in a matter of moments and she'll slowly come around, having thought she'd fallen asleep.
CONTROL
Prophecies would be very uncommon in occurrence, and incredibly random. ICly, they won't be something she'll be able to really control, nor will she be to able willingly to focus on what the prophecy will be about. Luna won't remember her prophecies. She will fall into a trance-like state while she speaks the prophecy, and unless she has someone with her — the prophecy would be otherwise lost.
Naturally occurring Prophecies happen during times of 'Natural Bleeding', or if Luna's Paleblood effect of a particular month mean an increased occurrence of Prophecies. In the future, when Luna works out what causes her Prophecies, she will induce one by spilling blood in a ritual — with one blood ritual per Prophecy.
USE IN GAME
Have a player plot coming up? Want to give your character a head's up on something happening in their life in Trench, or someone they know? Or perhaps give them knowledge about their canon futures? Maybe create an accidental self-fulfilling prophecy for them? I'm here for shenanigans. Let's talk.
Essentially, how this could go about is with OOC plotting for details on what you want your character to find out, it could then be implemented ICly simply by their character being around Luna and it 'happening randomly'. Threads can be played out or handwaved.
In the future, when Luna learns how to induce a Prophecy, it's possible for her to try and offer these to other characters since she'll be able to have them in a more controlled manner and organise to have someone around to record them. That way she can later contact people to tell them to Prophecies she's had.
Simply fill out the form with details and then we can plot something out!