The Rock leans on Recurring Nightmare and Volrath's Stronghold to recur threats like Deranged Hermit and Ravenous Baloth from the graveyard, so Tormod's Crypt can proactively cut off that recursion engine at a key moment. Masticore is a strong lategame threat that pressures their removal-light plan (mostly Smother and Diabolic Edict, which don't answer it cleanly since Edict effects let them choose the sacrifice) and can also snipe small creatures like Ravenous Rats. Squee is weak here since its recursion matters less in grindy games against a deck that doesn't punish hand size, and one Foil is trimmed since discard-heavy decks make hard counters awkward to hold up. Keep the aggressive core largely intact since Wild Mongrel and Arrogant Wurm race well against The Rock's slower removal suite.