Doesn't undermine anything? You couldn't be more wrong, just having Whis being present for a fight does just that. With him around you immediately know the heroes are impervious from failing because if something bad does happen they can simply try again. Even if he can only use the ability once (which I haven't seen any evidence for) one retry is all you need to avoid your past mistake and save the day as we've seen many times already. If the ability wasn't OP enough you also have the downright stupid logic of letting Goku and friends retain their memories after the fact. It wouldn't be as bad if Whis was the only one who remembered the rewound events and had to warn the others when going back but they don't even give us that!UpFromTheSkies wrote: It doesn't undermine anything. Whis has to be present when the event happens, he can only rewind a few minutes, and he can't use the ability over and over again. He might be able to undo one attack, but that's not going to save the day unless the villain is Golden Freeza who Goku and Vegeta could have defeated at anytime if they were being serious.
Also, the whole "Whis has to be present when the event happenS" doesn't really hold up when the guy can practically watch any event in the universe with his magical rod. This is exactly what he did with Zamasu, he didn't need to be "present" at all.
Here's a thought experiment, go back to any of the past arcs and try Inserting a broken character like Whis into any of those situations, you'll quickly realize how it ruins all tension by making everything feel overly safe. In the past the heroes paid dearly for mistakes by losing lives or suffering other negative consequences, this creates drama and interesting twists in the story. The heroes also learn from these mistakes and became better characters as a result. This doesn't happen when you give them get out of jail free cards like this.



