There was once a time when a card like this would have been one of the first reviewed for Vintage. The card is Harness Infinity and it has a lot of predecessors that have been competitive and even dominate in Vintage. (Mainly Yawgmoths Will and Recall)
Mana cost: 1BBBGGG
Effect of card: Exchange your hand and graveyard.
Exile Harness Infinity.
What I find appealing about this card besides having an insane powerful effect in the context of combo is that it is in G/B (Golgari). Golgari has a growing arsenal for combo in Vintage. Force of Vigor, Abrupt Decay, City of Solitude, Manamorphose, Land Grant, and Elvish Spirit Guide are amongst the green cards that are beginning to contribute to this idea. I believe there has been a green card printed in the last few years that has a similar effect - for the point of comparison if someone can recall the name of that card, I’d love to take a look at it.
Maybe this card allows are resurgence of cadaverous bloom and squandered resources?
I don’t have a definitive decklist that could display how this card would be used, but the potential and intrigue is definitely there. Maybe the first hurdle is to figure out how to generate GGG reliably.
And of course fastbond!