There is an achievement (an undeniable condition) in "Rogue: The Legend of Savior" that allows you to use the necromancer to fight the boss, which is more difficult because most bosses have monsters to help, and if you want to do this, you can use the necromancer to fight the lava BOSS level. This boss does not have the help of the monsters.
How to use the Necromancer to fight the BOSS with the Legend of Savior
If you want to use the undead art to fight the BOSS in the game, you can hit the lava BOSS level. Before fighting, you can remove the runes and undead art and take them with you after the boss comes out. This BOSS has no monsters, and you will be summoned if you kill the boss.
After completing the achievement, you will get a pet, remember to bring it with you.
