Blue will bring the ability to draw enough cards to keep going and return annoying permanents to your opponents hands, black brings with it graveyard tutors and the ability to return permanents from your graveyard to the battlefield and green gives us removal pieces to deal with some common graveyard hate effects, plus some of the heaviest hitters in the format that are worth reanimating
Seeing as Gandalf is among the most powerful and iconic Wizards throughout pop culture history, its no surprise to see one of his signature moments captured with a terrific Magic instant
If Shifted, Arthur will only cost 5 Ink to play, and its worth getting to the table
Tannuk, Steadfast Second (Mythic) Possibly the chase mythic for a Void Sacrifice deck
Having a card to protect from board wipes is also a great place to start because this deck has a bad time if it can't keep its creatures on the field
The Zhulodok, Void Gorger display commander is printed with the foil-etched treatment on a thicker cardstockgreat for showing off your commander but not legal for play