(Twin's POV)
Twin: "Where in the universe did you get that-"
Doctor: "Uh… it's not like I bought some phoenix ash from the black market…"
I'll admit, I kind of gave up on finding some ashes? And those happened to be parts of the brain, but… come on, you can still live with parts of your brain missing! My twin should be glad it isn't something like his d-(guess) missing.
Ah, nvm, he doesn't have a use for that- anyway! Maybe that's why he forgot some of his memories! Ah wait, now that I think about it… he really did forget because some parts of his brain were missing… but that ash can be someone else's you know?
There's only three phoenixes in this world…
Twin: "Did you… perhaps fill in some missing parts of the brain?…"
Doctor: "Of course? Where do you think I used that much-"
Twin: "Buckit…"
No way my twin's going to avenge himself by destroying the universe or something… that's what he tried to do in his second life as a cat since he still had his memories… ah, I was in search of finding out who killed my twin… but I'll have to do that sooner and bring them to my twin now…
Like… right now-
Twin: "Tell me who sold the ashes."