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{1}{B/R}: Switch a Killbot or Mary O'Kill in your hand with one on the battlefield. (If a creature is tapped, the switched creature is tapped. The same is true for untapped, attacking, blocking, enchanted, equipped, and targeted. Any counters on a creature are on the switched creature instead.)
Vigilance Knight of the Widget's power and toughness are each equal to the number of Order of the Widget watermarks among permanents you control.
Spells you cast that refer to artifacts or Contraptions in their rules text cost {1} less to cast.
Whenever another artifact enters the battlefield under your control, put a +1/+1 counter on Jackknight. If that artifact is a Contraption, Jackknight gains lifelink until end of turn.