If a “Sangan” or a “Witch of the Black Forest” equipped with “Horn of Light” is Tributed and you activate the effect of “Horn of Light”, “Horn of Light” goes on top of your Deck and then “Sangan” or “Witch of the Black Forest” is resolved. If “Sangan” is destroyed (not Tributed) the effects of “Sangan” and “Horn of Light” are simultaneous and form a chain.