Rōshi's Jinchūriki Forms

Rōshi was the jinchūriki of the Four-Tails. Not much is know about Rōshi or his tailed beast, except that it had ability to mix its earth and fire natures, to create lava which it spewed from its mouth. Due to being its jinchūriki, he also possessed this ability. Rōshi was eventually captured by Kisame Hoshigaki and the Four-Tails extracted, causing his death. However, during the events of the Fourth Shinobi World War, he was resurrected and made into a jinchūriki once again, yet the Eight-Tails remarked that his tailed beast felt "different".

Version 2
While the resurrected jinchūriki where beeing sealed by B's ink clones, they all quickly transformed into a version 2 of their tailed beast forms. In this form Rōshi resembles a giant ape. He is able to summon an enormous torrent of lava that erupts from the ground, before rushing towards the intended opponent.

Partial Transformation
After being resurrected, Rōshi demonstrated the ability to manifest one of the beast's tails. In this form he can envelop himself in an armour made of lava. The extreme heat generated by his armour is strong enough to burn his opponent, even without coming in direct contact with them.