Zyvax, void lord

Hexproof, First strike, Deathtouch
Whenever zyvax attacks, choose four cards from opponents hand and exile them.
{b}{t}: Play an extra turn after this one
{b}{b}{b}: Tap all opponents creatures, they can
not untap next turn.
{3}{b}{b}{t}: Elile top eight cards of opponents
library, put two of them in the battlefield under
your control.