Given the popularity of Spider-Man and his sinister villains, we'll probably see these characters for a while in Commander
However, these anti-synergies always sound worse in theory than they are in practice (see the current build of UR Murktide), particularly giving the turbo-fueling that DRC provides
Intruder Alarm prevents creatures from untapping during their controllers untap step, but instead causes every creature in play to untap when a new creature enters play
With such a tight lock on the board state, youre just one Massacre Wurm or Blightsteel Colossus away from victory
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Their ability to grow in proximity to additional copies of themselves makes them into potent swarm threats, somewhat similar to Slivers