Extreme Oath of the Jesuits
"When a Jesuit of the minor rank is to be elevated to command, he is conducted into the Chapel of the Convent of the Order, where there are only three others present, the principal or Superior standing in front of the altar. On either side stands a monk, one of whom holds a banner of yellow and white, which are the Papal colors, and the other a black banner with a dagger and red cross above a skull and crossbones, with the word INRI, and below them the words IUSTUM, NECAR, REGES, IMPIOUS. The meaning of which is: It is just to exterminate or annihilate impious or heretical Kings, Governments, or Rulers. Upon the floor is a red cross at which the postulant or candidate kneels. The Superior hands him a small black crucifix, which he takes in his left hand and presses to his heart, and the Superior at the same time presents to him a dagger, which he grasps by the blade and holds the point against his heart, the Superior still holding it by the hilt, and thus addresses the postulant:"
https://www.reformation.org/oath.html
https://en.wikipedia.org/wiki/Skull_and_Bones