Amulet Titan's whole plan runs through artifacts and enchantments — Amulet of Vigor untaps their bounce lands for absurd ramp, Urza's Saga assembles their artifact package, and Spelunking accelerates their land drops. Force of Vigor, cast for free, can strip Amulet of Vigor and Urza's Saga in one shot before they go off. Fade from History clears their artifact and enchantment board, including a ticking Urza's Saga, for the cost of a single 2/2 Bear. Birthing Ritual and Sink into Stupor don't disrupt their combo-ramp plan quickly enough, so both come out for the proactive artifact and enchantment hate.