Bloodnile of Hellish Depths

When Bloodnile of Hellish Depths enters the battlefield, create five blood tokens.
Anytime you lose life, create a 4/3 black and red
demon creature token with lifelose (When a
creature with lifelose attacks, you lose life equal to
half that creature's power, round down.)
{3}, {t}, Sacrifice a creature you control: Add {r}{r}{r}{r}{r}.