Rudimentary body potion

The Rudimentary Body Potion is a mysterious potion likely invented by Lord Voldemort. It was prepared for him by Wormtail and was used, possibly in conjunction with unknown spells, to create Voldemort's rudimentary body in order to sustain him while he awaited his return to full power. Two of its main ingredients were unicorn blood and snake venom provided by Voldemort's familiar Nagini.

History
The potion and its associated rituals were able to create a rudimentary body for Voldemort's disembodied soul-fragment to be transferred into. The body was small, like the size of a baby, and shriveled, but still retained some of Voldemort's true body's distinctive characteristics such as his snake-like nostrils and red, slitted eyes. This body's physical abilities were extremely limited and while in this form, Voldemort needed Wormtail to transport him from place to place and tend to him constantly. His magical powers were also greatly reduced in this state, although he was still powerful enough to cast an effective Killing Curse.

This body was used until Voldemort, with the aid of Peter Pettigrew and Barty Crouch Jr., was able to create the ancient Regeneration Potion to finally restore him to his true body and abilities.

Appearances

 * Harry Potter and the Goblet of Fire