Shock Lands, Hallowed Fountain, Watery Grave, Overgrown Tomb and the rest, do the same job with one small catch, you take two damage on entry unless you let them come in tapped
Cards that duplicate your serpent tokens are great too since your commanders activated ability requires serpents to sacrifice
The strongest pack has the fiercest pups
Gatway Shade can get especially vicious in a three color or more deck by using Gate lands instead of relying on a mono-black backdrop
Rather than combo decks having to rely on something like Laboratory Maniac, which was easier for the opponent to disrupt, Oracle winning the game when it enters the battlefield means that even if the Oracle dies in response, its too late
FINAL FANTASY COMMANDER: GREEN What deck that plays big creatures doesnt want Bugehagen, Wise Elder