alright so new wisdomverse update is out and i got food for one theory of mine(seems like its my turn to theory post after the update lol)
alright so in a few previous streams Lin mentioned that fable was the healer among the zeldas, due to her healing legend with her magic in one of her games(i think it was oracles but cant be sure here) but she had never mentioned how she healed... until now
fable has the life spell, specifically it was created by one of her ancestors and i think i know who: Downfall Kasuto
we dont know a lot about Kasuto, we barely even saw him however what we do know does point out to this being the case, Kasuto being a spell caster is supported by his Downfall Timeline title being the "Scholar King" as confirmed by lin in this post this is supported by his appearance in time's flashback in TSWK where time describes him as having a scholarly build if not for the muscle he ended up gaining after being drafted, Lin also mentioned him being her personal ship with lullaby, i personally wouldnt be surprised if he ends up with Elegy
now why does this point towards him being the inventor of the Life spell? well there is one thing i havent mentioned about kasuto yet, wich is his appearance on Lin's timeline for wisdomverse,
now for those who havent seen the wisdomverse timeline(go check it out) but Lin organized it the following way, the Zelda and Link for the game on one side and the other side its the game's name, and a section with the allies under FT and a section with the enemies under VS, Lin did explain what Dawn was doing in AOL with her saying that Dawn was teleporting the potions that refill your magic to rulie's general Location to help him, but she left the role Kasuto plays obscured
my guess? Kasuto is the wizard... no not that one the other one in the present that helps you by teaching you spells
as for how he survived all the way to AOL Times despite being from the era of the timeline split? well thats the neat part:he didnt, he is a ghost wich is why he sprite is half translucid(you can see the lines of the bricks behind him), how he somehow is present in kasuto town despite it being overrun by moas and destroyed and why he magically disappears after teaching rulie a spell