immune

Returns if the target was known to be immune to a spell.

immune(unit, spellID) : boolean
immune(unit, spellID) : boolean

Example

if not immune('target', Fireball) then
  return cast(Fireball, 'target')
end
if not immune('target', Fireball) then
  return cast(Fireball, 'target')
end

Note

Immunities are not obtainable on the client side, this utility maintains a cache in the background of known immunities the client has encountered.