That's an awful lot for just two mana, isn't it? Remember the Fallen only did two, and for three mana.

Hmm. But this is gold (and rare). Raise Dead is a one-mana common; so is Ritual of Restoration, which is strictly worse than the uncommon Argivian Find in two ways. Mine Excavation could get back two cards for two mana at common; so did Death's Duet and Morbid Plunder for three. And the type restrictions on this will make it quite hard to get the three-for-one, and if you do then it's unlikely you'll be casting all three of them this turn whether this is 2 or 3 mana.

All of which is to say, I think this is fine. Good, certainly; I'd definitely play it in place of Raise Dead in any black-white decks with artifacts and/or enchantments that might get sacrificed or destroyed. But even that isn't that common a circumstance overall. Multiplayer or Commander will lend themselves to circumstances where this is good more than regular Standard duels; it'd have to be a pretty unusual black-white control deck to take advantage of this.

It's tricky, that's for sure. Had this not said 'up to' there wouldn't be a problem... that card, in fact, could be found in the quarter bin, as a rare specialty trick.

I do find it interesting, though, that we're forced to talk about commons when we talk about this sort of effect. I can't think of any cards that just Stroke of Geniused for your graveyard. There's probably a reason for that.

What I do know is that Morbid Plunder seems fair, and so doesn't Divination. And that, while Divination doesn't see any play in dedicated tournament decks, I don't know many draw spells that are better at doing what Divination does (draw two cards for three mana). In fact, when you make uncommon and rare versions of Divination, you generally just tack on some mana and increase the card draw (hence, one more mana gives you Concentrate.) You don't trivialize Divination... you just make a better spell that's more expensive.

What that means for Reinvest's casting cost, though, is beyond me. You can only derive so much info from comparing to other cards.

Rares certainly have returned large chunks of graveyard: I particularly think of Creeping Renaissance, but also Empty the Catacombs, Bound // Determined, etc. But if we're talking Stroke of Genius from the graveyard, the card that most springs to mind (heh, Mind Spring) is actually common: Death Denied.