Drakes as loot
The majority of drake mounts are available as loot items from various dungeons and raids.
Culling of Stratholme
The Black Drake drops from Sartharion in the 10-man version of the Obsidian Sanctum and the Twilight Drake in the 25-man version. These drakes will only drop if all three of Sartharion's Twilight Drake lieutenants are still alive when you engage him.
The Azure Drake can be found inside Alexstrasza's Gift after defeating Malygos inside The Eye of Eternity in the 25-man versions. In patch 3.3.2 this drake was available from 10-man Malygos, but it was changed back to 25-man-only in patch 4.0.3.
The Blue Drake can be found inside Alexstrasza's Gift after defeating Malygos in the 10-player version of The Eye of Eternity. For a time during Wrath of the Lich King it was changed to a rare find in the after defeating Ley-Guardian Eregos inside The Oculus when using the Dungeon Finder. This change was made in patch 3.3.2 to encourage players to complete the instance instead of abandoning it. The Blue Drake was moved back to Malygos in patch 4.0.3.
The Onyxian Drake drops from Onyxia. The drop rate is incredibly low.
Deafeating Deathwing in the Madness of Deathwing encounter has two different drake mounts in the Elementium Fragment: the Blazing Drake is a rare drop on normal mode, and the Life-Binder's Handmaiden is a rare drop on heroic mode.
Other Drake mounts
The Albino Drake is a flying mount rewarded from the Leading the Cavalry achievement.
The Twilight Harbinger is a reward from the achievement Glory of the Dragon Soul Raider.
- The Mottled Drake can be obtained through the Worldbreaker TCG expansion set.
- The Feldrake will be obtained though the Timewalkers: War of the Ancients TCG expansion set.
Blizzard Pet Store
The Heart of the Aspects is a unique, luminous drake directly purchasable from Blizzard for $25US or €20/£17, and scales with the player's riding skill and location.