Yachi, the Azure Blossom

: Whenever a Samurai or Ninja enters the battlefield, you may draw a card, then discard a card.
+2: Target creature gets +1/+1 until end of turn. If it's a Samurai, it gains first strike. If it's a Ninja, it can't be blocked until end of turn.
-4: You get an emblem with "Counter the first spell or ability controlled by an opponent that targets a Samurai or Ninja you control each turn."