Brothers Yamazaki is a very interesting card

It managed to survive the M14 rules update almost unscathed

Yeah, it's one of those cards with a wording that stayed valid through a rules change, even though the functionality changed slightly

I guess it's because the situation where it actually matters is rare enough that it wasn't worth making a functional change.

I guess the interesting interaction is that if your opponent controls two of them and you play one, your opponent has to sacrifice one of theirs. It's sort of like the old legend rule, in that regard