Minstrel of Marit Lage

Cumulative upkeep: Discard a card
When Minstrel of Marit Lage dies, you may search your library for a card named Dark Depths and put it onto the battlefield, then remove X ice counters from it, where X is the number of cards in your graveyard.
"Dread Marit Lage lies dreaming, not dead. I intend
to awaken her from her slumber."