Of the remaining six non-zombie creatures: One is a clone, Vizier of Many Faces, which you are likely to make a copy of one of your own zombie Three have eternalize, so can come back as zombies Two are Grave Titan and The Scarab God, which both make zombies I feel like they did Grave Titan dirty by not making it a zombie, but then it wouldnt be as clean a cycle of Giants
Considering their power, unsurprisingly, Elesh Norn, Mother of Machines isnt only being played in Commander
Mewtwo ex was perhaps the strongest example of this mechanic at the time, able to put out 60 points of damage for just three energy
This attack does 10 damage times the number of heads
Finale of Revelation skirts that issue by untapping five of your lands so long as is or more
A slightly more sideways upgrade to Blasphemous Act, Blasphemous Edict does something similar, does it a little better, and sometimes a little worse