Darth Nihilus, Friend of Death

First Strike, Fear, Lifelink
When Darth Nihilus enters the battlefield, if you control Darth Sion and Traya, meld them together to create the Sith Triumvirate.
Whenever a creature one of your opponents controls dies, you lose 1 life and draw a card.
{3}{b}{b}{b}: Monstrosity 4