THE GOODZangetsu type of darkness if you know what I mean. His arm becomes covered with this stuff, which concerns Jackie. She wants to end the fight, but Ichigo will have nothing of it and continues to battle.
Chad confronts Ginjou about Tsukishima’s fullbring power. He is concerned about Orihime’s memory loss and believe Tsukishima’s power might evolve an aspect of that or thought manipulation. Ginjou states that can’t be true because all he knows is that his fullbring power is just a really sharp sword. But to double check, they have to see how Ishida is doing, because if he has memory loss than perhaps Tsukishima does have this power. Though Ginjou could have been stabbed, and had his memory tampered with as well, so who knows.
Well, Tsukishima knows, and he decided to drop in on the crew. First order of business was to slice the fish tank that held Ichigo. Which unfortunately for Tsukishima, revealed a Ichigo with shinigami powers! FUCK YEAH!