They Who Know Only Rage

When They Who Know Only Rage enters the battlefield exile X creature cards you control
under it. They Who know Only Rage enters the battlefield with X +1/+1 counters.
Haste
{r}, {t}, remove X +1/+1 counters: Return X creatures exiled under They Who Know Only
Rage onto the battlefield. Those creatures gain
haste until end of turn.
Blood will spill!