Bone Arbalist

When bone arbalist enters the battlefield, target creature gets -2/-2 until end of turn.
Postion 4 — {2}{b}, {t}: Bone Arbalist deals damage to target creature equal to its power. (If in position 4 on upkeep, gain this effect. You can change positions only once per turn on main phase.)
Bolts pierce not just flesh, but the very fabric of hope.