When Melinoƫ got Hermes' warning about the situation in Olympus, she knew she had to help. It was hardly even a question. Her family was up there, she couldn't just sit around while they struggled and suffered. And yes, she had her duties to deal with Chronos. But Odysseus had told her that cutting the Time Titan's forces off up in Olympus would improve her chances. So it was a win-win.
There were two issues that stood in the way of this new goal, however: the ward keeping her sealed out of Olympus, and the fact that her Hellish blood kept her confined to the layers of Hell. Erebus was as close to the surface as she could get. But she would find a way to deal with that, eventually. A simple incantation removed the seal from the entrance to Olympus. Hecate didn't stop her from removing it; she had figured that Melinoƫ would, once she was ready. Now all that was left was to ascend to the Heavens themselves.
As Melinoƫ reached the plains of Olympus, the shift in the air was clear to her; it was difficult for her to breathe, tightening her throat with every inhalation. But she pressed on. She had to. Her family needed her. She could deal with a little shortness of breath, surely. And besides, Olympus yielded plenty of reagents for her to use in her incantations.
Battling through the foes in Olympus wasn't too difficult, in itself. But the swift striking and dodging that it took to take them down were beginning to drain Melinoƫ, and casting was wearing her thin. And the further she progressed in Olympus, the more suffocating the air got. Her chest burned with pain as she passed yet another gate, pushing herself to go on as long as she could.
As the Fates would have it, that wasn't much longer.
Past the gate stood another group of enemies, leering and glaring at her as she entered their domain. Melinoƫ poised herself once again for battle, but her vision was beginning to grow hazy, and she saw double of her opponents. Sweat and blood dripped from her skin as she tried to persevere, tried to attack the nearest foe; but her technique was sloppy, causing her to get struck in the gut and set tumbling a few feet back.
Grounded and injured, Melinoƫ tried to muster the strength to murmur the incantation to return her to camp. But the words escaped her as with her shallow breaths, the oxygen in her lungs too little for her to speak upon. As her vision began to darken, Melinoƫ could've sworn she saw a shadow pass over her. Her heavy eyelids finally fell closed as the pained groans and shrieks of those who stood a threat to her filled the air. Then nothing, but darkness and silence.