High Overlord Saurfang
It's 11 years old now.
The patch 7.3.5 PTR is up and oh boy.
If you're planning on leveling an alt, it's worth hitting up Brewfest and then heading over to the Darkmoon Faire -- or using your Top Hat if you have one. If you're leveling through Invasions already, a solid 20% XP buff will make it go even faster