Sakura, Cherry Lotus Samurai

First strike, haste
Bushido 2 (Whenever this creature blocks or becomes blocked, it gets +2/+2 until end of turn.)
Warcry(Whenever this creature attacks, put a +1/+1 counter on it. At the beginning of your end step, if it didn't attack this turn, remove a +1/+1 counter from it.)
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"Swift as the coursing river, she'll strike you down." -Kentaro