Flash - Advent: Ancient Dragon & Cost 4 or more (Either Attack Step)
By sending your Soul Core to the Trash, stack this from your hand onto your target spirit.
[LV1][LV2] (When Advents) Destroy an opposing 15000 BP or less Spirit. The effects of a Spirit destroyed by this effect don't activate.
[LV2] Flash - (Your Attack Step) You can pay one cost to summon one of this Spirit's pre-Advent cards. When you've done so, draw a card.