wank, wank, wank.
So it is poison? Thanks for clearing it up. I thought it was more of a unique death hax involving double hits or something.
The poison supposedly enters through the crest that Suzumebachi puts on the opponent somehow.
Anyway so I guess its combination of poison and unique death hax as Taichokage says.
How would that factor in poison immunity? And yes I am aware immunity has relative limits too I suppose in fiction.