(This chapter aims to explain the knowledge inside the world of the Extremis System. It's spoiler-free, so don't worry if you want to know it through the adventures of the main character. Skip this if you want to.)
♥ Lost soul
A being that doesn't belong to the world of Esteban, the main character, is the living example of it, as he is a transmigration.
♠Wild Card
A card that grants powers with a condition to activate again—the main character has one of these, and it's called Survivor, which he can only activate if he's almost dead.
∆Dark star
A twisted and despicable being who plunders luck by killing them, it accumulates karma, and everyone who is a dark star is recognized as the strongest.
±Karma
It's the driving force that separates the evil from the good. If you do good, good things happen, and vice versa. But karma can be conjured in a way that you can give to people.
(+) Orthodox
The road of the saints, they only aim to accumulate good karma, as it gives powerful benefits to them.
(-)Demonic
They accumulate bad karma and get what they want with their own bare hands; they take the consequences or give them.
(=) Unorthodox
The way of living in the middle, accepting the bad and the good. They accumulate both karmas, accepting the grace of the god of evil and good {KARMA}.
♣{Karma}, the God of evil and good
A humanlike God who gave beings with his physical likeness the power to give karma.
/\ Tower
It emerges when the God Karma gives the powers to give karma; it's a trial tower that gives quests to the challengers. It benefits the lost souls greatly. No one knows what it does to the people who manage to go to the top.
\/ Tower artifact
The objects found inside the hundreds floor of the tower reward the venturer with a random tier ranging from 5 tiers.