Xylos Executioner

{t}{b}{b}{b}Sacrifice target token creature you
control, it cannot be regenerated. Put one +X/+X counter on target creature, X being the sacrificed creature`s toughness
Every time Xylos Executioner destroys a creature
in combat, place a 0/1 Black Sacrifice token on
the battlefield under your control with "This
creature cannot block or attack"