Sheoldred, Grave Master (EDH / Commander) [Revisione 9]

Early Game:
Focus on mana ramp and cheat in powerful creatures by dodging their mana cost. To do this, discard a card (using a discard outlet such as Collective Brutality, Pack Rat, Call the Bloodline, Oona's Prowler, etc) to put the creature from your hand into your graveyard. Then, put it on the battlefield with a low CMC card such as Reanimate ( or Necromancy, Animate Dead, Doomed Necromancer, Living Death, etc). Emrakul turn 2? Yes sir, thank you sir.

Mid game:
Try to set up a 'cheat-in' card (usually a powerful creature or a creature with a valuable ETB/death effect) in your graveyard to be able to get something big out for free on the turn after you cast Sheoldred, Whispering One.

Late game:
Ideally, you'll have Sheoldred on the battlefield, a creature with a good ETB/death effect in your graveyard, a sac outlet, and nobody messing with your graveyard. With this setup, you can sacrifice the ETB/death creature every turn and then play it for free on your upkeep per Sheoldred. An example of this would be Sheoldred, Whispering One + Viscera Seer + Gray Merchant of Asphodel to drain your opponents life each turn for the win. So long as you have a way to sacrifice, a way to re-animate, and a card in your graveyard that benefits from death or entering the battlefield, you can devise some pretty interesting plays.

Other Combos:

Sheoldred and any creature OR Bitterblossom + Contamination = Everyone's lands tap for a single black mana for the rest of the game. OOF.

Exquisite Blood + Vito, Thorn of the Dusk Rose = Infinite life gain (you) and infinite live loss (opponent), FTW.

This deck is pretty vulnerable to graveyard hate, so try to not keep things in the graveyard for too long. Always pilot this deck as if your opponent has a way to destroy your entire graveyard at any moment, it definitely happens!

Deck is a work in progress.