Board Thread:Episode Discussion/@comment-26512661-20200125162058/@comment-37919963-20200129154205

So, I just read this on Marrow's page, in regards to his semblance. (This is exactly what is said there.)

"This ability seems to have little to no limit seeing as Marrow was able to freeze an entire crowd of people in the episode "A Night Off". However, he must remain pointing at the enemy to keep them in place."

And seeing as Weiss and the Arma Gigas were in two different positions, Marrow couldn't have frozen both at once. So I guess using his semblance to win automatically would not have been the easy solution, unless if he used it at the moment that Team RWBY were in the same spot... which he didn't.