This deck grinds with Terravore, Sylvan Library, and land destruction from Winter's Grasp, backed by a heavy utility land package — Mishra's Factory, Rishadan Port, Treetop Village, Wasteland — so Tsabo's Web already in your maindeck is excellent here and should stay. Xantid Swarm pressures them early while denying interaction like Swords to Plowshares on your attack step, and Tormod's Crypt shrinks a resolved Terravore by removing land cards from graveyards. Tranquil Domain answers a resolved Sylvan Library in one shot since you run no enchantments of your own. Crystal Vein, one City of Traitors, and Sky Diamond come out since you'd rather keep your own mana untapped and available than risk it to Wasteland or Rishadan Port disruption.