User blog comment:B214/Volume 23 discussion blog/@comment-172.58.16.1-20170324223136/@comment-31137559-20170324232854

The king pieces are banned now. All the Rating Game players that used them lost their status and titles. And plus a king piece wouldn't work on a reincarnated devil or those devils that have extraordinary amounts of strength and demonic powers like Sirzechs, Ajuka, Diehauser, Rizevim, or Vali. Issei already has 8 pawn pieces and the merging of different pieces could cause disastrous effects. And plus why would Issei need or want a king piece? Just to make him more overpowered than he is now?