Vevcem, Saint of Sinners

Landfall — Whenever a land enters the
battlefield under your control, create a token that
is a copy of a token you control.
{3}{b}{b},{t}: Create a 5/5 black Demon
creature token with flying. Then sacrifice a
non-demon creature you control. Activate
this ability only if you control eight or more lands.
"Our salvation is continued only through
sacrifice."