Senshi the brave fighter

+1: Targeted Samurai gains +1/+1 and double strike until the end of the turn. And you will gain an extra loyalty counter during your upkeep
-4: Search your library for 3 samurais with a mana cost of 4 or less, reveal them, put them into your hand, Then shuffle
-13: Destroy all non-Samurai creatures that you don't control