Akridrem, the Mute

Each creature you sacrifice while casting this
spell pays for {1}.
If a creature card with flying was sacrificed while
casting this spell, Akridrem has flying. The same
is true for first strike, double strike, deathtouch,
haste, hexproof, indestructible, lifelink, reach,
trample, and vigilance.
He stitches new "enhancements" to himself from the
corpses that serve him.