Grixis Reanimator relies on Faithless Looting, Thought Scour, and discard to fill the graveyard, then uses Persist and Unearth to reanimate Archon of Cruelty, Emperor of Bones, or other creatures cheaply, so Grafdigger's Cage is excellent: it stops the target of Persist or Unearth from ever entering the battlefield from the graveyard. Be aware that Cage does not stop Emperor of Bones's own trigger, because that puts a creature card onto the battlefield from exile, not from a graveyard or library. Pithing Needle can be named on Emperor of Bones to stop its adapt ability, which prevents the counters that trigger its reanimation effect. Blade of the Bloodchief and Haywire Mite are cut since they do little against a deck with few relevant artifacts/enchantments and no reliance on token death; prioritize denying their graveyard recursion plan instead.