[Revo]

Perhaps take a look in OnPlayerTakeDamage

pawn Код:

new CantBeHarmed = INVALID_PLAYER_ID;

OnMiniMissionStart()
{
  CantBeHarmed = id;
  return 1;
}

OnPlayerTakeDamage(playerid, issuerid, Float:amount, weaponid)
{
  if(playerid == CantBeHarmed) return 0;
  return 1;
}

I'm not sure in what context you need this to be, so this is the best I can suggest.