Flash - Advent: Armed Machine (Either Attack Step)
By sending your Soul Core to the Trash, stack this from your hand onto your target spirit.
[LV1][LV2][LV3] (When Advents) Return an opposing Spirit to the hand.
[LV2][LV3] Flash - (When Attacks) Once per turn, you can summon one of this Spirit's pre-Advent-turned Spirit card, without paying the cost. When you've done so, discard an opposing Burst.