mtg card count FOIL - on Luck (Extended Art) #385 - Aetherdrift You may reveal that card and put it into your hand Gimli, Counter of Kills |

For starters, it will often be the case that you want cards in your graveyard

Theres none to be found here, which means youre unlikely to abuse Gary as so many black Commander decks have

Oketras Monument can lessen the cost of you returning your creatures to the battlefield, for instance

Then next we have your foe's exiling the top card of their library instead of their regular card flow and also have to cast it this turn so it might not ever hurt them if it's castable and not a reaction like Counterspell

Key Cards: Bloodletter of Aclazotz A vampire that doubles life loss for your opponents

Priced at over $94, its not quite in that $10 range, but its still something people will be happy to pick up cheaper (even if their opponents arent happy about it!)