I hc that when Welt gets genuinely angry his eyes do the Herrscher thing. Like, his eyes will flare into the red as he gets the “you done fucked up” expression on his face. However nobody really knows his eyes do this because of how rarely he gets actually furious and looses it. People notice his eyes change a bit when he uses his power, but not to the same degree as when he’s angry. Void thinks that they’re the one who’s the best at pissing Welt off, even when he scolds them his eyes remain how they always do. The first time he gets angry enough for his eyes to change it’s probably in a dire situation where his loved ones are intentionally targeted. Those glowing red eyes combined with the furious expression must be horrifying to see. Void breathes a sigh of relief knowing that Welt never got THAT upset with them or they’d magically gain the ability to dream just to have nightmares about it