Toshiaki Takayama's First Art Collection! Takayama is known for his popular illustrations for "Battle Spirits, " "Duel Masters, " "Sengoku Battle, " "Lord of Vermilion, " "Rage of Bahamut, " and " Valkyria Revolution" which were just released in January 2017. This is the long-awaited first art collection of Takayama's work which includes more than 200 items of his professional and private works.