Nagahara, Thousand-Blade City

Nagahara, Thousand-Blade City enters the battlefield tapped.
{t}: Add {r}, {w} or {b}.
{r}{w}{p/b}, {t} : Reveal the top card of your library.
If it's a Samurai card, put it into your hand and
lose life equal to its converted mana cost.
"Killers and thieves, thirsty for glory."