Nightmare of Rizaahn

Nightmare of Rizaahn, the Lost is a Fallen Captain Nightmare and the boss of the K1 Communion Lost Sector on the Moon. Once a Captain of high renown before it was killed, it was recreated as a Nightmare by the Pyramid to work with the House of Dusk and defend the Lost Sector. It first appeared in Shadowkeep and can summon Fallen and Nightmares, teleport, and perform a kinetic Ultra smash.