Soul Train

The Soul Train(ソウル・トレイン) was a sort of Over Soul that appeared at the end of the final battle within the Great Spirit.

About
The Soul train is a modern locomotive hauling both passenger and freight carts. Johann George Faust VIII and his wife Eliza Faust acted as it's conductors. The family and friends of the Five Elemental Warriors where seated in the passenger cars and Hao's followers and other teams who participated sat in the freight cars.

After Asakura Hao created a Black Hole within the Great Spirit, the Soul train appeared and Oyamada Manta together with Umemiya Ryunosuke appeared out of the window of the locomotive and grabbed the Five Elemental Warriors. Together with the X-Laws and the Archangels it was used to anchor everyone within the Great Spirit.

Anime/Manga Difference
Due to major changes in the storyline, the Soul Train never appeared in the anime series.

Trivia

 * It is based on a Freight rail transport though it also have passenger carts.