This changes the message when a troop emerges from "Bat emerges!" (using enemy name) to "Cloud of Bats emerges!" (using troop name).
With this plugin, the %1 placeholder in the "troop emerges" term will be replaced by the troop name instead of the enemy name. So, for a troop called "Cloud of Bats" containing 5 Bats, you will see a message like "Cloud of Bats emerges!"
For better explanation, see the forum thread (the "External link" below).