When there's a card with a Burst effect on your Trash, this set Burst is unaffected by opposing effects.
[ Burst: After your Spirit is destroyed by the opponent] Summon, from your Trash, one "Worldswalker"/"Avatar"/"Emperor Beast" Spirit card that was destroyed when this Burst activated, without paying the cost. After that, by paying its cost, you can activate this card's Flash effect.
Flash - Destroy five opposing 4000 BP or less Spirits.