The boy was just about to save his mother, who was suffering from cancer, when he was forcibly summoned to another world...
To his surprise, his long-missing older sister was here too!
“Little brother, if we sacrifice the essence of an entire world, we can bring Mom back to life!”
“Really? Then you attack from that side, Sis, and I'll attack from this side!”
“Trading the entire cultivation world to reunite our family is a bargain we can't lose!”
