Fighting Monsters In Another World: An Isekai LitRPG Progression Fantasy

A hero summoning circle. An inevitable death. A magical contract.  She thought that going to another world would be safer... She was wrong.  When a dimensional portal opened and an army of monsters invaded Earth, Kalysto Luna’s life was turned upside down.  Awakening with magic, and zero mana, a violet-colored window appeared before her:  [Do you want to survive?] But survival means so much more than she could’ve predicted. In enemy territory, Kalysto will discover what she can do as a dual-system user.  And what she was meant to become.  “Don't trust anyone... not even yourself."  Release Schedule: Tuesdays, Thursdays, and Fridays.  What to expect: Weak to OP MC Dual-system user This is not your typical Isekai Some gray characters Isekai, LitRPG, Progression Saintess/Wizard Patreon is 40 chapters ahead You can check my Patreon for advanced chapters here: https://www.patreon.com/ArawnDragon Please note: English isn’t my native language, so I’m sure I have some linguistic blind spots. Any feedback is more than welcome but please go easy on me. This story is published on Amazon: https://www.royalroad.com/amazon/B0CW3TGZNC. Extra Tags: survival, skills, levels, dungeons, classes, professions, portals, other races, adventures, weak-to-strong characters, betrayals, magic, gods.