It's kinda funny how the Japanese characters on the box or whatever that is in Byakuren's hand looks like it says "die".
It's a somewhat silly pun that the Japanese sometimes make. It comes from the fact that the pronunciations of 大 and "die" as well as です and "death" are the same in Japanese. Other examples include Die妖精 for a mad Daiyousei or DEATHよねー (desu yo nee) for death flags and so forth. In this picture, 大豆 (daizu) became die豆, so "soy beans" (lit. "big beans") became "die beans," appropriate to the Overkill pool.