Millie, Chosen Vessel

Whenever Millie, Chosen Vessel attacks, you may pay 3 life. If you do, it gains deathtouch until end of turn.
When Millie, Chosen Vessel dies, search
your library for a card named Nephthys Returned. Reveal it, put it into your hand,
and shuffle your library.
"You don't understand Sariel. He made me."
— Millie