Not sure if this has been known but Ferra/Torr has a block infinite against some characters in the corner if they don't have meter. This is done by looping b121 Ferra Toss.
Ferra/Toss is I believe +6 on block and b1 is a 10 frame mid. After Ferra Toss if you immediately do b121 then Ferra won't be back in time for you to do another Ferra Toss. However, if you delay it a couple of frames you will get Ferra back and still be able to do the block infinite. Walking forward works best so you can visually see when to input b121.
As you can see in the video, there's nothing I can do besides block. There is a gap to backdash before Ferra Toss but I think only some characters can backdash it in the corner. I believe this is a block infinite on characters with 8 frame or slower pokes, however most characters can low profile to get out.
Characters that I tested who can't get out:
Erron Black, Kenshi, Kitana, Takeda
What's funny is that this has been in the game since day 1 and has never been patched lol.
Credit to
@EMPEROR_KNICKS for making me salty and doing this shit to me online.
@colt