Maryam, Queen of Dusk

At the beginning of your upkeep, exile target
creature or planeswalker. Then its controller
gains life equal to its converted mana cost.
As long as you own four or more cards in exile, Maryam, Queen of Dusk gets +4/+4 and has
flying and indestructible.
Ascendant {4}{b}{b} (You may cast this card from
exile for its ascendant cost.)