make a new zone,with primeval coordinates.
and then,insert here
protected void onEnter(L2Character character)
{
//noble code here
}
about heal thingy,
one way is to remove every heal from every class/char when they enter in the zone.
be aware,
you have to add them again when they exit,here
protected void onExit(L2Character character)
{
//code for re-adding heal skill(s)
}
hope I helped.