Base on what? Such a thing has never been hinted at. And he knew Goku was supposed to die to a heart virus because Zuno told him everything about Goku. Him being sick and supposed to die and only saved by a time traveler would be basic information about Goku.Mazingerdestro wrote:
There is a strong possibility that Zamasu and Black can see alternative universes or even learn information from other versions of Zamasu (like Black knew that Zamasu in Goku's timeline is dead). This is also explained by the fact that they always happen to appear in front of Trunks or know when they arrive (saying that this is due to ki sense sounds a little bit far-fetched since last time Zamasu and Black instantly said "they have arrived"). So considering this it is possible that Zamasu will know about the wave. Also comparing Zamasu (an ssj3 at least in power++++pretty smart opponent) to Piccolo is a little bit day to night. Lastly someone mention it but I am not 100% that is true but isn't Mafuba a demon sealing technique?
It has nothing to do with being smart. King Piccolo was smart and never created a counter to the Evil Containment Wave. Piccolo knew about it and spent three years countering it so he believed that was his only weakness next to Goku.
As for the Evil Containment Wave only working on demons, it worked on Piccolo and he isn't a demon. He's an alien.



