We weren't expecting it, but it came just the same. Dropping in like a thief in the night, the patch 4.1 PTR showed up early last week and began slowly worming its way into the news cycle and into our hearts. There's a lot of pretty amazing stuff coming in with it. Zul'Gurub and Zul'Aman are back as heroic dungeons. You can walk right into Old Ironforge. Hunters can tame hydras. The Wintersaber mount grind is getting easier. There's a whole ton of new pets and mounts, along with achievements for collecting more of them. There's a new looking for guild feature. We may even see a caster legendary. There's also hints of a new Hallow's End, and with it, new lore for the Forsaken and the worgen.

That's just the tip of the iceberg, of course. You can check out more articles on all the latest changes behind the break. With realm maintenance lasting from 3 a.m. to 11 a.m. PST this morning, you don't have anything better to do, right? Be sure to stayed tuned throughout the day and coming weeks for more news as well.

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This article was originally published on WoW Insider.

Patch 4.1 PTR notes updated for Feb. 28