A Mecha Mage in an Ancient God Star System

You are a god. The goddess who rules over the deaths of all gods. Yan Beixi travels from the apocalypse to the interstellar age and inherits a divine title. By day, she's the ruler of the underworld; behind the scenes, she turns out to be utterly obsessed with going to school in space. * The homeroom teacher for the full-dive online classes is at her wit's end: one student has signed up for several notoriously difficult majors at once. "You're in the Individual Combat Department? And the Command Department?" "You're in the Mecha Engineering Department too?" "Even the Magic Department, that useless major nobody studies? You're in that too??" [Yeah. I want to study them all.] The teacher thinks this student is beyond saving. There's no way she can do well in all of them!! * Professor Maji: "Today, we're studying necromancy." As everyone knows, magic is purely theoretical and doesn't actually exist. After the thick white smoke cleared The professor stared in shock. "You summoned the Undead Emperor!" She stared in shock too. "I summoned my grandpa?" * The gods wage war on darkness in the name of light. She transforms into a mecha Grim Reaper and smiles sincerely. "It's a lovely day today. I shall present the gods with a gift: eternal oblivion." At the twilight of the gods, she gently frees the evil god and takes his hand. Demon wolves devour the sun and moon; giant serpents coil across the earth. The mecha goddess stands beneath a brilliant radiance as the gods of light are utterly annihilated. This is the darkest of times, and the best of times. * Goddess of Death: You may not believe me, but my whole family wants to trample the Federation, tear the Zerg apart, and rule the universe. I really do love peace, though. [The top student Goddess of Death, back from Earth x The scheming evil god who ascended to the throne of God King from the start] Reader's Guide: 1. The heroine is the strongest! There is no "strong heroine, even stronger hero" here! Theme: Studying makes me happy