The Soul Eater Experiment

This land enters the battlefield tapped.
{x}{t}—Add X colorless mana to your mana pool. You lose 2 life.
"Ah! Not like us, after all. The disgusting Xenos
do have a soul. A filthy, dirty Xenos soul, yes?
Not pariah. Not like The Silent Ones....."
— Culexus Operative