Faerie Macabre's discard ability directly attacks the graveyard density that fuels Tolarian Terror and Cryptic Serpent's cost reduction, making their finishers much harder to cast cheaply. Dust to Dust exiles artifacts and the opponent plays none, so it stays in the sideboard. Marauding Blight-Priest is the lower-impact body here, since tapping out for a 3/2 into Counterspell is a poor trade against a deck full of efficient counters and tempo-oriented threats, so trimming it to make room for graveyard disruption is reasonable. Prioritize curving out and exiling their graveyard fuel before Tolarian Terror and Cryptic Serpent become cheap.