Tranquil Mechanical Yeti is crafted by engineers with a skill level of 250.
|1x Cured Rugged Hide||4x|
|2x||2x Truesilver Transformer|
|1x Rugged Hide||12x|
Due to Thorium Widget and Truesilver Transformer needing 260 skill, if you want to create this using engineering parts that you've created then you will need 260 skill.
Unusually, Tranquil Mechanical Yeti required Ice Thistle E'ko to make when it first appeared. E'ko is only obtainable via a repeatable Horde quest, so the only way for Alliance players to make one of these yeti was to buy the E'ko from a neutral auction house. However, with patch 1.9.3, the requirement for Ice Thistle E'ko was changed to Cured Rugged Hide, making the yeti just as accessible to Alliance engineers as it was to Horde. Later, E'ko was also made accessible to Alliance characters.
Physically, Tranquil Mechanical Yeti looks like a small white yeti or wendigo. It's approximately the same size as the combat variants, which is to say that it is about as tall as a gnome, making it one of the larger small pets in the game.
This is taught by Umi Rumplesnicker after completing her quest chain .