"Dragon Ball Super" spoilers teased that Gowasu's health will take a turn for the worse in the upcoming 59th episode. The official preview for the next episode hints at Zamasu poisoning his own master.

'Dragon Ball Super' Episode 58 Recap

The 58th episode of "Dragon Ball Super," dubbed "Zamasu and Black The Two's Mystery Deepens," saw Zamasu heading to Lord Zuno's place, wanting to know more information about the Super Dragon Balls and Son Goku.

In the midst of Lord Zuno's explanation, a fretful Zamasu threatened him, asserting he can erase Lord Zuno in an instant if he desired. Uninterested in their appearance and origins, the Supreme Kai apprentice demanded Lord Zuno to tell more about how Super Dragon Balls can be used.

The scene then shifted to the Universe 10 with Gowasu noticing Zamasu was gone after finishing his tea. Son Goku, Beerus, Whis and Universe 7's Supreme Kai then visited Gowasu's home.

The episode ended with Zamasu's sudden appearance in the Universe 10, ready to serve Gowasu's tea.

'Dragon Ball Super' Episode 59 Spoilers

In the recently released preview trailer for "Dragon Ball Super" episode 59, Zamasu was seen serving Gowasu a few snacks and tea. Curious about the white snacks offered by Zamasu, Son Goku and the rest of the group believe that the latter will kill Gowasu and that they must stop him.

Towards the end of the 31-second trailer, Gowasu is seen dropping the glass of what looks like green tea. With this, many speculated that the Supreme Kai was poisoned by his own apprentice, as per GamenGuide.

"Since the future Zamasu had on a pair of Potara, which only Kaioshin are qualified to wear, Goku and co., figure that the Universe 10 Kaioshin Gowasu's life is in jeopardy," the official synopsis for "Dragon Ball Super" episode 59 reads. "They immediately head for Universe 10."

It is further speculated that Zamasu will later use the Super Dragon Balls to create Goku Black, wanting a servant that looks like Son Goku and using them again to wish for immortality. What's more, it is believed that Zamasu will truly kill Gowasu, becoming an official Kaioshin able to use the Time Rings, using one to hop forward a year in time to make the second wish with the Super Dragon Balls.

While nothing impossible, the reports should still be taken with a grain of salt. "Dragon Ball Super" episode 59 is slated to air on Sept. 25. Check out the preview below: