In not really a fan of black decks (too much removal of me), but looks like a fun build... Whens the C14 supposed to come out?

I'm pretty sure it comes out in November

If you add Phyrexian Altar , you go infinite with Gisa and Thornbite Staff.

The above only applies if there's a zombie buff on the battlefield. Just realized. One to sac for mana, one to sac to Gisa, and one to net you Zombies.

With Gisa, two things are going to benefit incredibly:

Zombie token tribal (obviously)

Cheap huge creatures (wait, what?)

So cards like Phyrexian Dreadnought and Hunted Horror are going to be all stars! (With a lot of them, you may have to activate Gisa's ability right when they enter, sometimes in response to their ETB, in order to alleviate their downsides: Phyrexian Soulgorger , Nyxathid , Drinker of Sorrow , Master of the Feast , Phylactery Lich , Phyrexian Negator , Desecration Elemental , Waning Wurm , Abyssal Persecutor , Desecration Demon , Grinning Demon , Stenchskipper , and Crumbling Colossus )

Happy deck tweaking!

Champion of Stray Souls has been a favorite of mine since it launched. Make tokens with Gisa, sacrifice them to reanimiate things to feed to Gisa again.

I would think about putting Nim Deathmantle in here if you are going more of a zombie theme. must have. Also another great one is Lim-Dul the Necromancer ill be back with more

Zombie Apocolypse for the flavor. Rise of the Dark Realms Oversold Cemetery Tombstone Stairwell

Zombie Apocalypse my apologies

its mono black so Contamination would really suck