Griffith, Leader of the Hawks

Griffith, Leader of the Hawks has the keywords of
all mercenaries you control.
{r}{t}: Sacrifice a mercenary, target mercenary gains
haste until end of turn.
{u}{t}: Sacrifice a mercenary, counter target spell
that targets you or a permanent you control.
{g}{t}: Sacrifice a mercenary, target mercenary gains
power and toughness equal to the sacrificed
mercenary's power.
"I must keep winning to attain my dream."