Bytor the Hunter

Doublestrike
As Bytor the Hunter enters the battlefield, you
may tap an untapped creature you control, if
you do, Bytor the Hunter gains haste until end
of turn.
Creatures attacking you get -1/-1 as long as
Bytor the Hunter is untapped.
"We must take time to enjoy the good things in life. The death throes of demons, for instance."