What A Strange, Interdimensional Trip It's Been

Before entering any instance, visit your Garrison and click on Pepe to have him ride on your head. Alliance Level 3 Garrison: find him in the tree between Large Plot 1 and Medium Plot 2. Alliance Level 2: in the tree directly behind the flight path. Alliance Level 1: in the tree to the left of the tent with your command table. Horde Level 3: in a smaller tree to the right of your Town Hall. Horde Level 2: in the large tree behind the flight path to the left of your Town Hall. Horde Level 1: in the tree to the east of your Garrison behind the fortification outside the wall. You must jump and click Pepe simultaneously to get him to land on your head.

Enter Bloodmaul Slag Mines and defeat Gug'rokk, the last boss, at 49.6, 24.6 in Frostfire Ridge. Normal difficulty counts — heroic is not required.

Enter Iron Docks and defeat Skulloc, the last boss, at 44.9, 13.5 in Gorgrond. Normal difficulty counts.

Enter Grimrail Depot and defeat Skylord Tovra, the last boss, at 55.1, 30.4 in Gorgrond. Normal difficulty counts.

Enter The Everbloom and defeat Yalnu, the last boss, at 59.8, 45.2 in Gorgrond. Normal difficulty counts.

Enter Auchindoun and defeat Teron'gor, the last boss, at 44.8, 74.5 in Talador. Normal difficulty counts.

Enter Skyreach and defeat High Sage Viryx, the last boss, at 36.0, 33.9 in Spires of Arak. Normal difficulty counts.

Enter Shadowmoon Burial Grounds and defeat Ner'zhul, the last boss. Normal difficulty counts.

Enter Upper Blackrock Spire at 20.8, 37.4 in Burning Steppes and defeat Warlord Zaela, the last boss. The dungeon entrance is also marked at 51.9, 25.1 in Burning Steppes. Normal difficulty counts.

Enter Highmaul and defeat all required bosses across its three wings: in the Walled City wing defeat Kargath Bladefist, The Butcher, and Brackenspore; in the Arcane Sanctum wing defeat Tectus, Pol, and Ko'ragh; in the Imperator's Rise wing defeat Imperator Mar'gok. Normal difficulty counts.

Enter Blackrock Foundry at 51.4, 28.7 in Gorgrond and defeat all required bosses: in the Slagworks wing defeat Oregorger, Gruul, and Blast Furnace (Heart of the Mountain); in The Black Forge wing defeat Hans'gar, Flamebender Ka'graz, and Kromog; continue through the remaining wings to defeat Beastlord Darmac, Operator Thogar, and the remaining required bosses. Normal difficulty counts.

If you cannot find this achievement under Dungeons & Raids in your achievement panel, note that it was moved to the Collections category as of patch 6.2.