Black can draw cards and give the downside to its opponent if you pay enough mana for the effect. Repeatable Syphon Mind is the good part of the card. The ideal way to play the card is -2, -2, blink Kaya to get her back to 5 and then start over. The card is just bad if you're planning to use her 0 on anything else.
The biggest problem with the card is that its a huge flavor fail. The only thing she can actually kill is tokens; she can't actually kill Brago, King Eternal with any of her abilities.
I'm sure the story card that depicts her killing Brago will be flavored as a spell she can cast.
Magic Story - Tyrants
* Brago is having a dinner meeting with other ghosts. At the king's request, cogworks have been removed from the streets and the Academy has been closed down. Brago's guard, Adriana, feels guilt about this.
* After leaving for just a minute, Adriana comes back to see that the coup has already taken place, with all the banners being replaced by ones with black rose symbols. She rushes to the throne room and sees Kaya with her knife in Brago's throat.
* Adriana attacks, but her sword phases through Kaya. Brago "dies". They continue fighting for a bit, with Kaya taunting Adriana. Kaya leaves by dropping through the floor. Adriana decides to take Brago's sword.
* Marchesa is crowned queen the very next day. No one seems surprised by this turn of events and even seem already accustomed to her.
* Adriana confronts Marchesa. Marchesa confirms that she can't kill her or else the guard would turn against her. Adriana spits at her and leaves.
* Adriana goes up to some random people and gives a speech about standing up to Marchesa.
* Three months later, there's a lot of unrest in the city.
* Adriana goes to meet Selvala the elf explorer. She wants her to help make the United States of Paliano.
New art: