Legendary Six Samurai - Kizan (STOR-EN020) - Storm of Ragnarok 1st Edition

If you control a face-up "Six Samurai" monster, other than "Legendary Six Samurai - Kizan", you can Special Summon this card from your hand. While you control 2 or more other face-up "Six Samurai" monsters, this card gains 300 ATK and DEF.