What does Elfinkazi move and attack like heroes mean on the Roost Roam talent?

This line of text is meant to convey to the player that the Elfinkazi follows all Movement rules for heroes found under the Hero Movement header in the rules reference page 9. Elfinkazi do not have to make progress towards their Mark when they move, they can use as much or as little Movement as they wish, they can move before or after minions but may not interrupt the Movement of minions to perform its Movement. They are able to Attack but may choose not to. Other rules that are applicable to heroes, like the two-Hero limit or Campfire Mode, do not affect Elfinkazi.