Berserker Personalities you own in and out of play have
Yu
+2.
Limited:
Any number of times per turn, bow this card and target your Crab Clan Personality: Permanently give him the Berserker keyword.
Reaction:
Any number of times per turn, after one of your Crab Clan Berserkers or Samurai is destroyed, bow this card: The next time this game, when paying for a Crab Clan Personality you are bringing into play, his Gold cost is 0 until he enters play.