Yidams

In Vajrayana Buddhism, an Ishta-deva or Ishta-devata (Sanskrit: इष्टदेवता) (Yidam in Tibetan) is a fully enlightened being who is the focus of personal meditation, during a retreat or for life. The term is often translated into English as tutelary deity, meditation deity, or meditational deity. The Ishta-deva appears in the 'Inner' refuge formula of the Three Roots and is also the key element of Deity Yoga since the 'deity' in the yoga is the Ishta-deva.