When the two Transcendent Incarnations left, the remaining seven Mortal Incarnations fell into disarray. All of them couldn't believe that the two left without instructing them of what to do next.
True, they only have Mortal strength at the moment but they're also a Transcendent in their World. Well, given that Remi didn't even give them so much as a glance after giving them instructions earlier. She probably didn't deem them as comrades but subordinates.
And since they're just an Incarnation, no one of them will die anyway.
Because of that, Ezyn and the others finally got a chance to end them. One by one they disappeared into motes of Dark Energy. To not waste anything I used the tanks to store the Dark Energy they left behind.