Guardian: Defense to Others

A person who wakes up in front of a book that records the subjugation of monsters
You are a scribe. I fell asleep while writing down the monster subjugation in my book.
Records that lie ahead Since then, I start to recall some battles when I can't remember them well.

You're the commander. Pick up the unit and deploy it to subdue the monster
Three races of Elf, Skeleton, and Goblin Guardian can be picked up. A total of eight grades are available
(Normal, common, unicorn, rare, Epic, Legendary, Insane, Overhaul)
Pick up the Guardian, upgrade all the races
Catch a boss every 10 rounds to acquire and strengthen your weapon to clear more rounds.
The more you clear the round, the more passive you can take advantage of.

Use your experience in combat to continue the battle