skeleton king caster of souls

if you pay {4}{b}{b} you can put a 4/5 zombie
knight in the battle field
tapped and gain 1 life.
if you pay {1}{b} you can counter a counter sorcery
or in instant spell, instant speed.
if you pay {3}{b} you can use skeleton king caster
of souls as a enchantment giving the creature
+5/+5, vigilance and death touch.