We’ll be performing our first stress test for WoW Classic on Wednesday, May 22, from 4–6pm PDT. During this time, the closed beta test realm will be unavailable. Those who are currently in the beta test will only be able to login to the stress test realm during this time and beta testers can participate using their existing installation. We’ll also be adding a significant number of players to the stress test from the pool of people who have already opted in for the beta but have not yet been selected.

Since the same client is used for both our stress test users and our normal beta users, the name in the Battle.net App has changed to “Beta & Stress Test: WoW Classic.” If you’ve been selected to participate in the stress test, you’ll see this option appear in the Region/Account drop down menu so you can download and install the WoW Classic client in advance, but you’ll only be able to see the stress test realm when it becomes available.
FYI: If you’re returning to WoW after an extended absence prior to patch 5.0.1, it’s possible that you’ll have more than the maximum pet limit and/or more than 3 of a kind. However, this will be the only time that you’re allowed to surpass these limits. You will have to pare down your collection, eliminating your duplicates, in order to add new pets. 

Only really to expand on Gráinne's comment as regards the 'collecting' and 'roster development' sections - which are, as said 'distinct' although they are intrinsically linked - I would like to point you in the direction of the in-game Achievements > Battle Pets > Collect tab. There are a series of achievements called Raiding With Leashes, pretty much all of which can be completed via the auction house - if you have the gold/inclination - or by completing old raids.

We’ll be performing our first stress test for WoW Classic on Wednesday, May 22, from 4–6pm PDT. During this time, the closed beta test realm will be unavailable. Those who are currently in the beta test will only be able to login to the stress test realm during this time and beta testers can participate using their existing installation. We’ll also be adding a significant number of players to the stress test from the pool of people who have already opted in for the beta but have not yet been selected.


The argument for this is simple: what makes classic WoW great to one player might be different from what makes it great for another. And who are Blizzard's designers to say which old features were just good or bad design for each player? It's an approach that shows Blizzard believes (at least to some degree) that WoW doesn't just belong to its creators but to its fans. That struggle between authorial intent or game design orthodoxy and "the player is always right" is at the heart of many of gaming's big contemporary controversies. But so far, Blizzard seems committed to its plan with regard to WoW Classic.
World of Warcraft Classic lets you play the game as it existed almost 15 years ago, upon the release of the 1.12 "Drums of War" update. Blizzard says it considers that era to be the correct balance of the game resembling its original launch state while also having ironed out some of the rough spots of launch. This version is also including some updates under the hood, like modern server infrastructure and Battle.net social features.
Bioelectric Blast (Deadly) - Blasts the target area with electricity. Inflicts 65,654 Nature damage to enemies within 8 yards of the impact and creates a patch of Electrified Ground. Electrified Ground inflicts 14,882 Nature damage every 2 sec to players within it. Shock Burst (Important) - Inflicts 4,377 Nature damage every 2 sec for 12 sec. Upon expiration, strikes all players, inflicting up to 26,261 Nature damage. This damage is reduced the further away players are from the blast. Electric Discharge (Healer Alert) - Wekemara discharges electricity from itself. Inflicts 13,131 Nature damage that chains to additional targets every 1.5 sec. Submerge - Upon reaching 50% health, Wekamara will submerge and summon Spawns of Wekamara. Electrified Splash - While submerged, Wekemara rains electrified water from its pool. Inflicts 21,885 Nature damage to enemies within 3 yards of the impact area. Spawn of Wekemara (Damage Dealer / Tank Alert) Charged Bite - Inflicts Nature damage to an enemy Conductive Spittle - Inflicts Nature damage to an enemy and increases Nature damage taken by 50% for 16 sec. Loot Tables
For the stress test, all races and classes will be available for creation, but the maximum level will be set to 5. The test will also take place on a PvP realm, but since the starting areas are sanctuaries you don’t need to worry about attacks from the other faction if you just want to level up to 5. We expect to put a lot of people in the starting zones, though, and we’re looking forward to seeing what you all do as we test the servers under crowded conditions.
Along with revealing the WoW Classic release date, Blizzard also listed plans for both a beta and stress test of the game. Players who opt-in for the testing on their account manager page and have an active subscription will be randomly selected for the beta starting May 15. Then the developer will have three stress tests where players can log in to play the game for a short period of time on the following dates:
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