Astronomy and Astrophysics Supplement Series 85 3 : 1015—1019.
スバルはレグルスの死で魔女因子から強欲の権能を獲得 スバルが…イケメンに見える '-' — ラフ 《固ツイ変えました!! As of a hundred years ago, Regulus had 78 wives, and as of Arc 5 he is mentioned to have had 291 wives in total.
To this day, he is the only person that managed to kill.
At some point in the past, Regulus got hold of and small black box , similar to the one Petelgeuse had.
Wind imbued with Stillness of an Object's Time: Regulus cutting Petelgeuse's arm off by simply lifting his own right hand.
Despite him being the strongest Sin Archbishop of the Witch Cult, and killing Reinhard, he never managed to kill Subaru.