source: Seventh sons have strong " knacks " (specific magical abilities), and he is extraordinarily rare and powerful
target: Seventh sons have strong " knacks " (particular magical skills), and seventh sons of seventh sons are both very rare and powerful.
references: Seventh sons have strong " knacks " (particular magical skills), and seventh sons of seventh sons are both very rare and powerful. Seventh sons have strong specific magical abilities and seventh sons are both rare and powerful. Seventh sons are born with strong and specific magical abilities; seventh sons of a seventh son are extraordinarily powerful and rare. Seventh songs have strong " knacks " (special unique skills), and seventh sons of seventh sons are both exceptionally rare and powerful. Seventh sons have strong magical abilities, while the seventh son of a seventh son's abilities are rare and powerful. Seventh sons have strong " knacks " (special magic powers) and seventh sons of seventh sons are very rare and very powerful. Sons that are seventh born are strong