What was in the 6th coffin in Naruto

In Naruto, when Kabuto conjured the sixth Coffin to terrify Obito and demonstrate his might, it included Madara Uchiha. When it came to knowledge about a wide range of topics, Kabuto was an expert.

What was in the 6th coffin which Kabuto summoned in front of Tobi

Spoiler] What was inside the coffin Kabuto showed Tobi : r/Naruto

Final Coffin Reveals Madara Uchiha --- Naruto 559 Manga Chapter

What was in the 6th coffin which Kabuto summoned in front of Tobi

What was in the 6th coffin in Naruto

Obito Uchiha

Summoning: Impure World Reincarnation, Narutopedia

What was in the 6th coffin in Naruto

Naruto – The Man Called Tobi (Part II)