all mtg cards with partner of the three-color pairs in [C16] : r/EDH Partner Matchmaking with Commander Legends

It's one of the only cards in the format (or ever) to be able to brag about this

In addition to typical black reanimation, the Necrons make use of unearth and mill to make sure that you can always get plenty of value out of your graveyard

It provides the ability to grind out when you run out of cards, almost giving you an extra card draw each turn, but better, as it's a permanent of your choice from your graveyard, nulling any efforts by your opponent when using removal spells

You can also go so far as to play cards like Faithless Looting and Big Score to drop giant monsters like Dragons and Eldrazi into the graveyard to copy with Feldon