[LV1][LV2][LV3] (When Summoned) You can reveal three cards from the top of your deck. Among the revealed cards, add every card with Advent to your hand. The remaining cards are discarded.
[LV2][LV3] (Your Attack Step) When you're stacking a card via Advent, this card can be treated as Cost 5.
[LV3] (Your Attack Step) When you're stacking a card via Advent, this card can be treated as Cost 6.