Somnych,Titan of Night's Veil

When Somnych enters the battlefield, sacrifice it unless it escaped.
Whenever Somnych enters the battlefield or
attacks, all other creature loses all abilities and are
black Shades with base power and toughness 0/1 .
Escape—{b}{b}{b}{b}, Exile five other cards from
your graveyard. (You may cast this card from your graveyard for its escape cost.)