Thanos, Universe Destroyer

When Thanos, Universe Destroyer enters the battlefield, create 4 5/2 creature tokens named The Black Order, with trample and menace.
{b}{1} sacrifice a creature; Thanos, Universe Destroyer gets an Infinity stone counter.
{r}{1} Destroy target creature; Thanos, Universe Destroyer gets an Infinity stone counter.
{t}{4}Remove 6 infinity stone counters from Thanos, Universe Destroyer; destroy half of each opponents permanents, rounded up.