Migadol's Thunderbolts

S3 E4: "The Divine Fist of the North Star saves people. You should forget about revenge." When Yu-Ling tells Fei-He Fei-Yan's last words, she doesn't know what to do with herself. Meanwhile, Kenshiro is doing his best to find Erika and Yasaka. Erika has been taken to an underground palace, where's she told the truth about "Migadol's Thunderbolts" by the leaders of Genesis. What are the Thunderbolts...