Thoughtseize strips a key piece like Cori-Steel Cutter or a removal spell before this low-to-the-ground tempo deck can establish its gameplan, and buys crucial tempo against their fast clock. Buried Alive does nothing to interact with their aggression and is far too slow, so it's cut entirely. Witherbloom Charm's destroy mode kills Dragon's Rage Channeler or Monastery Swiftspear cheaply at instant speed, which is valuable against their small, efficient threats. Timeline Culler's body isn't relevant enough against their burn suite (Lightning Bolt, Lava Dart) to keep at full count.