WoWDB

While this event is active, players level 30 or higher may access a special Timewalking Dungeon Finder queue, which scales players and their items down to revisit past dungeons from the Wrath of the Lich King expansion. While Timewalking, bosses will yield loot appropriate for a player's natural level. During Wrath Timewalking, you may assemble a raid group of between 10 and 30 players, travel to Dalaran in Northrend, and speak with Vormu to access a Timewalking version of the Ulduar raid.