Spirit of the Rising Sun

Knights and Samurai you control have
first strike, vigilance, and swordsmanship 3
(Whenever this creature blocks or becomes blocked, it
gets +3/+3 until end of turn, and any creatures
blocked by this creature get -3/-3).
Whenever a blocking creature an opponent
controls dies, you may pay {w}. If you do, you
may search your library for a Plains card, put it
onto the battlefield tapped, then shuffle.