Shakazeth, Promised Darkness

Hexproof, Indestructible, Trample.
As long as your devotion to black is greater than 15, Shakazeth, Promised Darkness can't be countered.
When Shakazeth, Promised Darkness enters the battlefield sacrifice it unless your devotion to black is greater than 10.
When Shakazeth, Promised Darkness enters the battlefield each opponent sacrifices 3 permanents that share a color with their highest devotion.