Vengeful Spirit

Deal 2 damage to target creature, if it kills
that creature, refund the cards cost
Overload {b}{b}- target creature gets -3/-3
until end of turn, if it dies this turn refund
the full cost
"A desire for revenge is seared into the SOUL of those
who fell in battle or were wronged in life. A Shaman
can concentrate this desire and cast it out into the
world to burn away whatever stands before them."