Ripples of Undeath

At the beginning of your first main phase, mill three cards. Then you may pay {1} and 3 life.
If you do, put a card from among those cards
into your hand.

"Worm-like creature that prefers damp, dark habitats." "Dangerous, unpredictable foes that infest the pipes below Hallownest's capital."
— Flukemon Journal Entry