Dragon Ball Super has reused a number of once forgotten techniques throughout the series, with one of those being Master Roshi's Evil Containment Wave (Mafuba). This technique had previously not been seen since Dragon Ball, however, it returned during the Zamasu and Goku Black arc earlier in Dragon Ball Super.
From what Dragon Ball Super fans can see from the preview leading up to episode 105, it looks as if Master Roshi will attempt to use the old technique in the Tournament of Power.
Master Roshi looks as if he may struggle against a Universe 4 female warrior due to his perverted nature. This is despite him so far resisting his urges, largely due to his training with Paur back on earth leading up to the tournament.
Originally the user of the Evil Containment Wave died, however, as the fighters in the Dragon Ball universe continued to get stronger they found a way to combat that. Although, Master Roshi isn't as strong as some of the others and could still be risking his life while using the technique.
Roshi in episode 105 will be unleashing a powerful technique that will put his life in danger, with it being assumed that the technique Master Roshi attempts to use is the Evil Containment Wave. In the preview for the upcoming episode, fans can see Roshi placing a bottle below him, which could be the container he will use to seal the Universe 4 fighter within.
The Evil Containment Wave was invented by Master Roshi and Master Shen's master in Master Mutaito, who used is to seal Demon King Piccolo. Roshi used the technique later in Dragon Ball as well against the Namekian when he returned. Both Mutaito and Roahi died after using it, however, there have been many more who have used it since and have not paid the ultimate price.
Dragon Ball Super's "Universal Survival" saga is part of the recent simulcast agreement that sites like Crunchyroll and Funimation have scored. Dragon BallSuper airs on Crunchyroll Saturdays at 7:15 p.m. CST. Toonami airs the English dub on Adult Swim Saturdays at 11:30 p.m.