quest The Plaguebringer's Reques

The DK quest 12716 “The Plaguebringer’s Reques” objective: Noth the Plaguebringer has requested that you bring him 1 Empty Cauldron, 1 Iron Chain and 10 Crusader Skulls.

on sniff I find out: on queststart the podest should be empty, after reward quest, spell 52706 create the Cauldron and 3 Iron Chain up on the podest(shown as short video ), then spell-aura 52707 should make the Cauldron visible to you. (caster & target=player)

how can we do so with gameobject 190936 the Cauldron??? and give him invisibility to (misc = 10 (10), miscB = 0)