While you have a "Blade Beast" family Spirit in your Trash, this set Burst is unaffected by opposing effects.
☼[ Burst: After Your Opponent activates a Spirits (When Summoned/Advents) effect]
Exhaust three opposing Spirits. After that effect resolves, summon this Spirit without paying the cost.
[LV1][LV2][LV3] (When Summoned) Return an opposing exhausted Spirit to the bottom of the deck.
[LV2][LV3] (When Attacks) The opposing Burst can't activate.