Grant a custom amount of levels to a RaF-linked player.
- String (UnitId) - player to grant levels to.
- Number - amount of levels you wish to grant to the unit.
- You must be in visibility range of the unit; the unit must also fulfil RaF requirements for level granting — check with CanGrantLevel.
- Regardless of the value of the levels argument, the function only grants a single level to the unit.