The Mistress of the Underworld, Ereshkigal (FGO/S75-E052SP SP) [Fate/Grand Order Absolute Demonic Front: Babylonia]

[AUTO] When this card attacks, if you have another "Chaldea" or "Babylonia" character, this card gets +1500 power until end of turn. [AUTO][CXCOMBO] When this card's battle opponent becomes [REVERSE], if"Together With Bloomed Flowers in the Underworld" is in your climax area, put 2 cards from the top of your deck into your waiting room, choose up to 1 level X or lower character in your waiting room, and return it to your hand. X is equal to the total level of the cards put into your waiting room by this effect. (Climax are regarded as level 0)