For the anon that asked for a fic where Phil goes through au’s to find Dan, I think the fic they’re looking for might be “and in the end I’ll do it all again (and again, and again)” by thesleepdeprived on ao3

phanfictioncatalogue:

In The End, I’d Do It All Again (And Again, And Again) – Dan and Phil are in a car accident and Dan is killed with Phil left in a coma, Phil is offered a choice- live through thousands of alternate universes fighting for his and Dan’s one in a million chance at life, or walk away unharmed.

– Tori