Code of the Samurai

At the beginning of your end step, each player
creates a 1/1 white samurai with bushido 1.
At the beginning of each players combat they
must have target samurai they control fight target samurai they don't control. Whichever samurai
wins, it's controllers draws a card and puts a
+1/+1 counter on a samurai. If it's a tie you gain
3 life.
{3}{g/w}: Samurai you control get +1/+1 until
end of turn