Nahiri, the Kor Warrior

Vigilance, first strike, Rech,
Whenever a kor, warrior, or Rogue, spell enter the battlefield, creatures you control get a +1/+1 counter.
{1}{g}{r}{w},{t}: create X 4/4 kor creature token
where X is the number of creature on target
player battlefield.
Creature you control get menace and vigilance.