Atropos, Nyctasha's Nightmare

{t}:Nightmare—Choose a player, until end of that player's next turn or until that player loses life,
that player can't cast spells or activate abilities of artifacts.
{b}{b}:Brain Sap—Target player loses 3 life, you
gain life lost that way.
"By the Black Blood of Nyctasha, whose heart burst
with fear of me, all shall drown in darkness."
—Bane Elemental