Flash - Advent: Cost 3 or more & Machine Beast (Either Attack Step)
By sending your Soul Core to the Trash, stack this from your hand onto your target spirit.
[LV1][LV2][LV3] When this Spirit would leave the field due to the opponent, by paying two cost to summon one "Machine Beast" family Spirit card from your hand, put one core from the Void to this Spirit and it remains on the field, on the same position.
[LV2][LV3] Flash - (Either Attack Step) Once per turn, refresh this Spirit.
Rulings:
The timing of the [LV1][LV2][LV3] effect is: Declare Ceryneia's effect>Show MachineB Spirit in your hand>Get 1 core from the void to Ceryneia>Pay 2 cores and summon MachineB Spirit.
Regarding the [LV1][LV2][LV3] effect: Previously, if the only two core available were on Ceryneia, the player could still use the effect to remain on the field, depleting Ceryneia and then putting a core on it from the Void. As of 08/08, if Ceryneia would be depleted to activate the effect, the effect cannot be used.