Arch-titan Wyrd

As an additional cost to casting this spell,
sacrifice two creatures.
Create four 1/1 zombie wyrd creature tokens.
Living Spell {3}{b}{b}: (When you cast this spell,
you may pay its living spell cost; if you do, as it
resolves it enters the battlefield as a creature)
Arch-titan Wyrds power and toughness are equal to the number of zombie and wyrd creatures in all graveyards.