The Tantric Shiva tradition ignored the mythologies and Puranas related to Shiva, and depending on the sub-school developed a variety of practices. For example, historical records suggest the tantric Kapalikas (literally, the 'skull-men') co-existed with and shared many Vajrayana Buddhist rituals, engaged in esoteric practices that revered Shiva and Shakti wearing skulls, begged with empty skulls, used meat, alcohol, and sexuality as a part of ritual. In contrast, the esoteric tradition within Kashmir Shaivism has featured the "Krama" and "Trika" sub-traditions. The Krama sub-tradition focussed on esoteric rituals around Shiva-Kali pair. The Trika sub-tradition developed a theology of triads involving Shiva, combined it with an ascetic lifestyle focusing on personal Shiva in the pursuit of monistic self liberation.