Breath of Hadar

With this spell you rip open a 5 foot cube rift to Realmspace through which Hadar can taste the essences of the mortal creatures you display before it. Upon opening the rift, Hadar breath's forth his energy in a 15 foot cone doing 1d8 Cold, 1d8 Acid, 1d8, Necrotic, and 1d8 Psychic damage. Immediately after the exhalation of energy, Hadar inhales, pulling any creature within a 30 foot cone 10 feet closer to rift opening. The area in a 15 foot cone outside of the rift is considered difficult terrain. A Dex save vs your Spell DC causes creatures to take half damage and are not pulled 10 feet closer. Any Creature that is pulled into the extradimensional rift space is immediately restrained and no longer able to target or be targeted by spells or abilities coming from outside the rift. They are still affected by each breath. A creature may end the restrained condition with a successful Athletics check against your Spell Save DC. Any creatures still inside the rift when the spell ends takes 4d8 force damage and is knocked prone as they are forcefully ejected to any space within a 30 foot cone of the spell. Creatures slain by this spell are sucked into the rift. They, and their remains, are unrecoverable short of a Wish or True Resurrection Spell.  

You may trigger the breath 3 times, at which point the spell immediately ends. You may also use your action to relocate the opening and/or direction of the rift.