Sadistic Slum-Ruler

When Sadistic Slum-Ruler enters the battlefield,
put X follower counters on it.
{t}, Remove a follower counter: Create a 1/1
black Follower creature token.
{3}{b}{b}, Sacrifice any number of Follower tokens:
Put a +1/+1 counter on Sadistic Slum-Ruler for
each Follower token you sacrificed.