Abaddon, Soul Reaper

Flying, hexproof

As an additional cost to cast Abaddon, Soul Reaper, you
may sacrifice any number of creatures. This spell costs {2}
less to cast for each creature sacrificed this way.

When Abaddon enters the battlefield, search your
library for a creature card with a mana cost equal to the
number of creatures sacrificed to cast it plus {1}. Put that
card onto the battlefield. At the beginning of your next
upkeep, return all creatures sacrificed to cast Abbadon to
the battlefield with