Ankh wants to point out that by that logic Eiji could also have brought back the same thing that happened to him the first time. But he suspects Eiji already realises and that was ignoring risk to himself as usual, and saying it will do about as much good as every time he tried to convince him that going back to the phantom was a bad idea. So he's not going to bother.

And that aside, he can't really fault the rest of what Eiji said, so he just falls back on his usual standby.

"Tch. Idiot."