Gridiron Nightstalker

Trample, Haste
Whenever Gridiron Nightstalker deals combat
damage to a player, put a +1/+1 counter on it.
{1}{b}: Gridiron Nightstalker gains lifelink until
end of turn.
Blood Rush: {2}{b}, Discard Gridiron Nightstalker:
Target attacking creature gets +3/+1 and gains
trample until end of turn.