As Rally the Ranks enters the battlefield, choose a creature type.
Creatures you control of the chosen type get +1/+1.
Because damage remains marked on creatures until the damage is removed as the turn ends, nonlethal damage dealt to creatures you control may become lethal if Rally the Ranks leaves the battlefield that turn.
You must choose an existing creature type, such as Hippo or Hellion. You can’t choose card types (e.g., artifact) or supertypes (e.g., snow).