Niamh's revelation shook Arianna to her core.
"Sister, why?" Arianna pleaded.
Niamh's smile twisted. "You abandoned me, Arianna. Left me to darkness."
Arianna's eyes welled with tears. "I thought you died with Kalen."
Niamh's laughter sent chills down Eli's spine. "Kalen's darkness saved me."
Aethon's grip on his sword tightened. "You'll pay for harming the realms."
Niamh's gaze locked onto Eli. "You, Eli, are the key to my plan."
Kael stepped forward. "We won't let you harm her."
Niamh's smile grew wider. "You'll soon understand the true meaning of darkness."
As Niamh vanished, the realms plunged into chaos.
Eli's heart pounded. "We need to stop her."
Arianna's determination hardened. "I'll confront my sister."
Aethon nodded. "Together, we'll protect the realms."
Their quest led them to the Shadow Realm, where Niamh's darkness reigned.
Within the shadows, Eli sensed an eerie connection to Niamh.
"Arianna, what's happening?" Eli asked.
Arianna's voice whispered. "Niamh's tapping into your power."
Kael's eyes blazed. "We won't let her control you."
Eli's resolve strengthened. "I won't let her win."
As they faced Niamh, Eli realized the true depth of her connection to the sister.