Journey Into Nyx, Godsend Part II — Jenna Helland

Elspeth's trials in Theros continue in this second Godsend adventure inspired by the myths of ancient Greece
 
In a realm where fickle gods fight for the devotion of mortals, the planeswalker Elspeth has risen to become the champion of the sun god Heliod, who transformed her legendary sword into a spear named “Godsend.”
 
As Elspeth defends the city Akros from minotaur hordes, she uncovers a horrible truth: If the machinations of the satyr planeswalker Xenagos come to fruition, he'll ascend to godhood and threaten the entire realm of Theros. Made a pariah by Xenagos, an exiled and hated Elspeth fights for her life. As she hunts Xenagos, Elspeth must attempt to breach Nyx, the realm of night -- and the home of the gods.