RAY was about to swing it's other heat blade at Eren while the first heat blade would be still blocked by Eren, but Raiden immediately blocks that second blade, and begins to run up the Metal Gear's blade/wing, slashing it apart into pieces of scrap. Raiden then leapt off of RAY as it only had one heat blade/wing left, in which it wasn't strong enough to break through Eren's arm which blocked it in the first place.
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"Hey, we're just talking about the migration chart," Takahisa said happily to Armin.