Landstill runs almost no creatures worth Edict effects (no real targets beyond occasional Mishra's Factory or Faerie Conclave activations), so Chainer's Edict and Diabolic Edict are dead weight against a control shell built on Standstill, counterspells, and sweepers. Withered Wretch adds a clean blocker and grinds value by exiling their graveyard, which matters against Fact or Fiction and Impulse digging for answers, while Tormod's Crypt can strip resources they've committed to the graveyard. Pernicious Deed and Phyrexian Arena remain central since Deed answers Standstill and their manlands/Powder Keg, and Arena provides the card advantage needed to grind through a long control game.