There wasnt a single duplicate deck in the entire top eight
Horn of Deafening sounds cute
A rabbit thats absolutely jacked
It turns out that Magic players love casting spells for free, even if free in this case is pay seven mana for an artifact and cross your fingers you overcome the randomness to get what you want. The silver lining, of course, is whatever spell youre copying from your graveyard gets to stay there on the chance youll copy it again, unlike many cards of this ilk that exile the spell following the resolution of the copy trigger, so if you can find a way to finesse only one legal target for the Crucibles trigger (perhaps by ensuring the top two cards of your library are lands with something like Senseis Divining Top), then youll get to copy the same thing over and over
Pyroblast ($7.98) A card for cEDH, its becoming more of a thing for the lower tiers of Commander, as well
Assuming you are on the play, I would lead with the Grief on turn one (pitching the Exhume) as you want to make sure that this Entomb will resolve