Broken Moon

Broken Moon enters the battlefield tapped.
{p/b}{t}: Add {b}{b} to your mana pool.
{x}{x}{2}{b}{t}: Destroy target nonland permanent with converted mana cost X or less.
In 2708, a comet collided with Boreas's moon Cleo, shattering its surface.This impact had catastrophic effects
on Boreas's environment, and many scientists agreed that
by 2778 it my become uninhabitable.