Mutate
Immediately before taking your first march, after dragon attacks have been resolved, you may attempt to Mutate providing the following criteria are met:

  • An opposing player must have at least one unit in their Reserves Area.
  • You must have at least one army containing a Swamp Stalker at a terrain.
  • You must have at least one Swamp Stalker unit in your Dead Unit Area (DUA) (or a Deadlands minor terrain in play).

Target units an opponent's Reserve Area to make a save roll. Units that do not generate a save result are killed. One of your armies at a terrain that contains at least one Swamp Stalker unit can then recruit or promote Swamp Stalker units up to the health-worth that were killed this way. The number of units that may be targeted in this way is equal to the number of Swamp Stalker units in the Swamp Stalker player's Dead Unit Area (DUA), up to a maximum of one †.