User blog comment:Xilinoc/Ch. 600 - SNIPE/@comment-5551986-20141012134949/@comment-18753817-20141013023825

Maybe he also has cards that list the probability rate of each type of death he picks for example "Chance of heart attack 87\100, chance of it being fatal 50\100" it would explain why he would of had to think of various ways to kill Mayuri if he didn't retreat.