YMMV / Kamen Rider Decade Ep 11555 Faces 1 Treasure

Complete Monster (includes "Faiz High School's Phantom Thief"): Momose/Tiger Orphnoch, the prideful leader of the new Lucky Clover in the World of Faiz, is introduced as a member of a gang of bullies studying at Smart Brain High School who is quickly revealed to be a budding psychopath. Having orchestrated a series of attacks targeting other students, Momose tries to kill Takumi's best friend in front of him and orders his comrades to indiscriminately kill numerous students while he could watch and mock the victims. Not satisfied with the initial massacre, Momose gathers the survivors in a circle for them to be executed one by one, informing them that if they are lucky, they could be turned into Orphnoch.