User blog comment:Xilinoc/Ch. 647 - THE THEATRE SUICIDE/@comment-11446176-20151015132227/@comment-24531362-20151015180938

Katen Kyōkotsu: Kuromatsu Shinjū: Verona - the 'Lover's Suicide,' kills people caught within the range on the ability, in multiples of two. If the user and one other are the only ones in range, both die. If there are three people in range, two die. If there are four, all four die. So on and so forth.