Mahakali is the Hindu goddess of time and death in the goddess-centric tradition of Shaktism. She is also known as the supreme being in various Tantras and Puranas.
Mahakali, National Museum, Delhi
Mahakali Yantra
Mahākāla is a deity common to Hinduism and Buddhism.
Mahākāla and companions
Indian Buddhist Mahakala, 11th–12th century, Bihar
A basalt statue of Mahākāla from Odisha, dated to the Pala period (eastern Bengal, 1100–1200 CE). Victoria and Albert Museum, London
Black-Cloaked Mahākāla