Sillva, along with his partner, Goldd, appeared as members of Dark World Army. They offered to take Chazz Princeton, Alexis Rhodes, Atticus Rhodes and Tyranno Hassleberry to Brron's fortress. Chazz challenged them to a Duel, but the Dark World spirits said that they must bring in Jaden's friends alive, then knocked them unconscious, bringing them to the fortress. However, Goldd and Sillva then realized that there were supposed to be five sacrifices--Syrus Truesdale was missing. They later tracked Syrus down, only to find him plunging off a cliff to his apparent "death". Goldd and Silvva opted to retreat and not mention any of what they saw to Brron.
In World Championship 2007 and 2008, Sillva, Warlord of Dark World use a "Dark World" Deck titled "100% Dark World" and "Special Silver".