For the duration of the fight, creatures in the immediate area will not be visible to you (but they may still attack you if they wander too close). Keep in mind that other players will still be able to see you and attack you if you are eligible for player vs. player (PVP). Other players will also be able to view your pet battle in real time, including the pets involved as well as their health as the match progresses.
In the Duelist Kingdom tournament, Bonz, Sid and Zygor met Bandit Keith, who agreed to coach them through the tournament, so all four of them would advance to Pegasus Castle. Keith wanted revenge against Maximillion Pegasus for humiliating him in the final match of the Intercontinental Championship. While helping them win Duels the first day of the tournament, Keith secretly intends to use them for their Star Chips. When Keith finds out about Yugi Muto, Joey Wheeler, and the rest of the gang, he plans to get in their way and eliminate them.
Wrathguard: (Caution) The martial Eredar of the Burning Legion, these soldiers enact the will of the masters of their cause. Where the Felguard often charge crazed into battle, the Wrathguard operate under a singular purpose that is to protect their charges and to strike precisely against the enemies of the Burning Legion. Just the same, the Eredar Wrathguard are not to be trifled with, showcasing a pinnacle threat to any demon hunter unfortunate enough to summon one during their ritual. However, those that are capable of defeating these outstanding soldiers and maintaining their power would no doubt be imbued with the same physical endurance and threatening presence as that which now labors within them to escape.
To get back to Classic for a bit, this is what I think is happening. Players who prefer the old ways (and full disclosure, I'd count myself among them, but to a smaller degree than most) complain/talk about the negative sides of modern WoW and Battle for Azeroth in general. While they do this they also talk about how things were better before and often mention Vanilla as a reference point. People who enjoy BfA now feel attacked by this and so they retaliate. Hence, liking Classic means you either have nostalgia goggles on or have no idea what you're talking about and will hate the same things you say you want 2 weeks after you start playing it. It's an amazing thing, where literally each side is doing to the other what they feel is being (wrongly) done to them. I feel like writing this is the most redundant thing I've ever done, and yet I also feel that it needs to be said, because it seems some people just don't get what they're doing, or at least I hope they don't (some do and are doing it on purpose but there's trolls everywhere so there's no point in even discussing them).
Bonz has the upper hand, as his Zombie-Type monsters gain a 30% ATK and DEF bonus because of the Graveyard Field, and when they are destroyed, they just regenerate, and become even stronger from "Call of the Haunted". However, when Yugi and the gang arrive, Joey manages to figure out the Zombie's main weakness and that is their DEF is 0. Using "Shield & Sword" to switch their ATK and DEF values, Joey wins the Duel. Bandit Keith then locks the gang in, double crosses his three companions, and enters the Duelist Kingdom Finals after taking Zygor and Sid's five Star Chips by force.
In Classic, playing different classes actually feels different in more ways than just their abilities, at least if you think about it a little. Playing a priest, you really want to find a group because that's what the class was designed for, which is both good and bad - you're stuck very slowly leveling if you're solo, emphasizing the frustration of the slow pulling, but having different classes require different gameplay can be good. If you want to play a priest you're going to have to be more social by default, just whisper the guy you see killing stuff next to you and go level together, you'll immediately have a better time of it (this part is particularly exacerbated in the beta, as there are fewer players).
When it comes to Classic, Blizzard's goal is to provide an authentic Vanilla experience, but they also needed to come up with technology to handle many players at launch, which is similar to sharding. While the use of this technology will be limited to the first month following launch, many players are questioning this decision and wouldn't like to see layering in the game at all.