Banner of Apotheosis

Once per battle, in your hero phase, if this unit is
on the battlefield, you can pick up to 3 friendly
Stormcast Eternals units wholly within 12" of
this unit to be affected by the banner's energy
(you can pick the same unit multiple times).
If you pick a unit once with this ability, you can
heal up to D3 wounds allocated to that unit or,
if no wounds are allocated to it, you can return
a number of slain models to that unit that have
a combined Wounds characteristic of D3 or less.