Black Knife Assassin

Hexproof, deathtouch

Slashing Blade of Death - When Black Knife Assassin enters, destroy target legendary creature.
Jumping Blade of Death - Whenever Black Knife Assassin deals combat damage to a player, that player gains an emblem with "At the beginning of your upkeep, this emblem deals 1 damage to you."

They say the assassins who carried out the deed were scions of the Eternal City. A group entirely of women, arrayed in armour of silver under cloaks which fooled the eye. {