Acheron, Emantor of Nihility

First Strike, Indestructable, Haste, Devoid
Crimson Knot - When Acheron attacks, put a Crimson Knot counter all all creatures defending player controls, then deal damage to defending player equal to the number of Crimson Knot counters on the field.

Slashed Dream Cries in Red - When Acheron deals combat damage to a player, exile up to three creatures that player controls

"Acheron..." Merely a borrowed name. You know my nature, remember my deeds... Thus, I am Acheron.