River Kaijin

Target creature gets -5/-5 until end of turn.

Flash Tapped creatures you control can block as though they were untapped.

G: Add one mana of any color.

Bushido 2 (Whenever this creature blocks or becomes blocked, it gets +2/+2 until end of turn.) Each other Samurai creature you control gets +1/+1 for each point of bushido it has.

T: Add C. Tap an untapped legendary permanent you control: Untap this artifact.

Look at the top three cards of your library. You may put those cards on the bottom of your library in any order. If you do, return Petals of Insight to its owner's hand. Otherwise, draw three cards.

(T: Add R.)

(T: Add W.)