Silentblade, Cunning Assassin

Ninjutsu {2}{b}{u}{p/b}{p/u}
Whenever Silentblade, Cunning Assassin deals combat damage to a player create a treasure artifact token. It has {t}, sacrifice this artifact: add one mana of any color.
Whenever a criminal you control deals combat damage to a player create a treasure artifact token. It has {t}, sacrifice this artifact: add one mana of any color.
Silentblade, Cunning Assassin is black and blue