World of Warcraft is celebrating its 21st anniversary, and Phase 6 of WoW Classic 20th Anniversary is now approaching its end. The continent of Azeroth will soon undergo a radical transformation as Burning Legion invades.
While no official date has been announced, many players believe it will arrive in December. We can also make some predictions based on the history of The Burning Crusade.

TBC Classic Anniversary Release Date Prediction
The original Burning Crusade expansion officially launched on January 16, 2007, while the pre-patch went live on December 5, 2006, approximately 40 days later.
In the current in-game phase of WoW Classic 20th Anniversary, Naxxramas raid has been open for about a month and a half. Following the usual server practice, pre-patches typically last for two weeks.
To align with the 20th anniversary theme, the official timeline may mirror the original game. This means the pre-patch duration may no longer be the usual two weeks, but could be extended to four weeks or longer to align with the original release schedule.
If the expansion launches in mid-January, a two-week pre-patch would coincide with New Year's Day, which would be inconvenient for both the development team and players. An earlier, longer pre-patch would allow players to enjoy the new content during Christmas and New Year holidays.
Furthermore, mid-January is considered the dead of winter, and releasing a large expansion at this time would better maintain player engagement.
Specific Date Predictions
All pre-patches for Classic are released on Tuesdays. Therefore, several Tuesdays in early December could be the official release dates for pre-patches, namely December 2nd, December 9th, and December 16th.
December 16th is the most likely release date, as it marks approximately four weeks from that date to mid-January, forming a complete pre-patch cycle.
The official release date for TBC Classic Anniversary is January 15th or 16th. This date almost perfectly matches the original release date of January 16, 2007, fitting the anniversary theme.
Furthermore, data mining reveals a January 15th date marker in WoW Classic 20th, though its specific content is unknown, it's highly likely related to an expansion release.
Moreover, major expansions for WoW Classic 20th Anniversary are typically released on Thursdays, and January 15th happens to be a Thursday.
Unrelenting Rallying Cry Of The Dragonslayer Buff
Currently, in WoW Classic 20th Anniversary, all characters automatically receive a powerful World buff called Unrelenting Rallying Cry of the Dragonslayer upon login.
The buff's effects are as follows:
- Increases spell critical strike chance by 10%.
- Increases melee and ranged critical strike chance by 5%.
- Provides 140 attack power.
It cannot stack with the regular Rallying Cry of the Dragon Slayer, cannot be stored by Chronoboon Displacer, and disappears in dungeons and battlegrounds, but the effect is retained after death in open-world maps. Players can choose to disable this buff at any Innkeeper.
Official information states that this buff is to celebrate World of Warcraft's 21st Anniversary. The buff only lasts for one week, ending on Monday, November 24th at 10:00 AM PST.
What Does The Buff Do?
This buff is extremely powerful, essentially a permanent Rallying Cry of the Dragon Slayer effect, greatly improving leveling and monster-killing efficiency in the open world, especially beneficial for physical and magical classes such as Warriors, Rogues, Feral Druids, and Enhancement Shamans.
It is recommended that players, especially those aiming for these classes, make full use of this week to level up, as the experience will be significantly better than without the buff.
This buff also applies to Anniversary Hardcore Realm. It significantly reduces the challenge of Hardcore mode, providing an excellent opportunity to level up a Hardcore character.
The appearance of this powerful, one-week-limited buff may be a signal that a pre-patch announcement for The Burning Crusade Classic is imminent.
This buff has appeared during the week of November 17th, and the official announcement of the pre-patch is likely to follow the week after it ends, around the end of November or beginning of December. This aligns with the predicted mid-December release schedule mentioned above.
How To Prepare For TBC Classic Anniversary?
The arrival of TBC is still some time away. Although this period might be a bit boring, you can do some simple things to prepare for TBC.
You need to reserve at least 20,000 WoW Classic 20th Anniversary gold for TBC. Firstly, you'll need a flying mount for questing in Outland and entering raids. Additionally, your initial gear, gems, and consumables will all require gold.
In the early stages of TBC, the demand for materials will be high. You should start stockpiling WoW Classic 20th Anniversary materials now to craft items that will increase your TBC profession levels. If you have enough time, you can also train profession alt characters, such as Tailoring, Engineer, and Enchanter.
These are the rough predictions for the end of Phase 6 of WoW Classic 20th Anniversary and for the launch of TBC Classic Anniversary. The pre-patch date is likely December 16th, and the official release date is likely January 15th, 2026.







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