Psychic Kraken

Vitiate 3-(This creature enters the battlefield Vitiating target creature an opponent controls until either it or this creature leaves the battlefield. Whenever that creature deals damage or is dealt damage, it's controller loses 3 life.)
"These new beings, the Phyrexians, are on the hunt for Elspeth. Without Erebos freeing her, they will consume all of Theros faster than we can resist the impure perfection."
-Ajani