Lucia, Blade of Crimea

Double strike

Whenever Lucia, Blade of Crimea deals combat damage to a player, exile the top card of that
player’s library. You gain life equal to that card’s mana value. Until end of turn, you may cast that card and you may spend mana as though it were
mana of any color to cast that spell.

{u}: Untap Lucia, Blade of Crimea.