Cthurken, Beast of Death

{6}{r}Each player sacrifices half of all creatures they control
{5}{w}Exile 3 target creatures
{3}{g} Cthurken, Beast of Death gains trample until end of turn
{6}{u}Put 10 +1/+1 counters on a creature
{4}{b}Return 3 creatures from your graveyard to the battlefield