While its in play, Portal to Phyrexia compleats those creatures it recently killed, resurrecting them to serve you like a reverse Reya Dawnbringer
It can't be helped because it's dangerous if you make it correspond to the preliminary preparation Even if you use it with Blue-Eyed, there is little reason to go out of your way to use it since Advanced Ritual Artexists
Klinklang PLS would eventually follow, but the precedent had already been set
As a green black deck, it also puts emphasis on sacrificing creatures to gain card advantage
The card itself is great, if not a bit dark, but Genesect's lukewarm popularity will probably hold this card back from reaching even greater heights
I was never super happy with the swatting of the goblin