Zorklax, the Soul Hoarder

Flying, Hexproof, Coalesce (When you cast this
spell, you may sacrifice any number of spirit you
control. This spell cost {1} less to cast for each spirit
sacrificed this way.)
When Zorklax, the Soul Hoarder enter the
battlefield with X +1/+1 counter on it, where X
is the number of Spirit sacrificed to cast it.
"Zorklax hoard souls in death as he did with gold in
life."