Kelsien, the Reaper

Vigilance, haste
Kelsien, the Reaper gets +1/+1 for each
experience counter you have.
Whenever a creature dies that Kelsien dealt
damage to, you get an experience counter.
{t}: Kelsien deals 1 damage to target creature
you don't control.
"Aim for an eye. Better they never see you."