creature:say("EXIT", TALKTYPE_MONSTER_SAY, true, creature:getId(), Position({x = 318, y = 394, z = 11}))
Position({x = 318, y = 394, z = 11}) are wrong bro
or you use
Position(318, 394, 11)
or
{x = 318, y = 394, z = 11}
also...
you can edit this
creature:say("EXIT", TALKTYPE_MONSTER_SAY...