Shadowverse

Yes, the nerfs are good. I think I have an extra Duel card lying around. It's okay for the Knight, even if it becomes a bit weaker, but I'm not sure how much the Sorceress will recover after this. The buff is also not bad (not that I play with the Dragon in unranked, but it's still nice).

I haven't seen this card since it was announced, even in the arena.

I haven't either. Nevertheless, it was this card that helped the player clear my full board of Brambles, which he couldn't normally deal with using artifacts.

It could have been a guy from the lower ranks. They sometimes play with such crazy decks that it's just unbelievable.

Unless it was a Master from the lower ranks - there was a Master icon there. Although, it's quite possible that this guy has already qualified for the finals and is now just having fun playing with a silly deck.