S02E17 - The Empty Book

Kara is imprisoned in a mysterious jellyfish by the aquatic Mortigarians. The other Defenders arrive to free her (Adam and Erik are wearing breather masks while the others breathe thanks to their guardians merging). The Mortigarians demand the Tome of Al-mortigar in two days, at the Chi'Brek monument, otherwise they won't see Kara again. Arriving in Barrier city, separating from their guardians somehow, Seth meets with members of the Ogaman Federation to see the Tome. However, Aaron the Hunter only promised for him to see the Tome and it cannot be removed. As he leaves, an Ogaman colonel sends his men after Seth only to be caught and their uniforms stolen. Seth and Rion disguise themselves as janitors, Mel and Adam go as the Ogaman soldiers while Erik takes over the power grid. When Adam and Mel run into ID trouble, Seth and Rion put up a convincing distraction to lure away the guard. Once inside, Erik disables the power grid to the forcefield surrounding the tome, allowing Adam and Mel to try to lift but it weighs a ton. In the confusion, the soldiers shoot Adam, but he is saved by the Tome, which he is carrying. Unfortunately, this damages it beyond recovery. However, Brim's name is on the cover, so Rion contacts Brackus as to where his last location was. They return to Mount Altamor where they find it is Malco's base. Brim is frozen in a block of ice, surrounded by sigil slayer eggs. They split up; Seth and Mel retrieve the icons while the others rescue Brim. The latter run into a little trouble with the parents of the eggs but got out with ease. Elsewhere, Flinch had drugged K'tahsh and contacts Brackus to tell him that allowing the Defenders the icons was a success. However, K'tahsh had woken and was listening in on their conversation. As the Defenders make their way to the monument, Brim says there could be another way to save Kara. Arriving at the monument, both sides demand what they want. The Mortigarians call the humans "invaders" because they believe that humans came from a dying planet and took over. Seth refuses to believe him and hands over Brim. Just as one part of the exchange was made, K'tahsh crashes the party and takes the icons. Erik proceeds to free his sister, just as the Mortigarians arm a plasma cannon at them. The others cover it with their attacks, causing it to explode, knocking their ship out of the sky. Erik and Kara hug, despite that they are covered in jellyfish slime. But Kara is confused that they would let the Mortigarians have Brim. Mel tells Kara that Brim had the memories of the lost sigils transferred to Erik allowing him to be able to carve stones (thanks to an old wizard spell), just like how Brim does. As they leave the monument, the viewer is shown carvings that depict that RaDosians (humans) have arrived on RaDos from another world.