Call for Aid

You can use this command ability once per battle
when a friendly Redeemer unit with 5 or fewer
models is destroyed. If you do so, pick 1
Stormcast Eternals Hero on the battlefield.
A new replacement unit identical to the unit that
was destroyed is added to your army. Set up that
unit wholly within 12" of that Stormcast Eternals
Hero and more than 9" from all enemy units.