When Nyla enters, exile up to one target creature card from your graveyard. If you do, you lose X life and create X Clue tokens, where X is that card s mana value. (A Clue token is an artifact with "2, Sacrifice this token: Draw a card.")

At the beginning of your end step, if you control no Clues, return target card exiled with Nyla to its owner s hand.