Glistering Meteorite

{1}, {t}: Add {b} to your mana pool.

Whenever you would cast your second black spell
this turn, Glistering Meteorite becomes a 1/1 artifact creature until end of turn. It is an Elemental in addition to its other types, and it gains haste and deathtouch.

Always examine glowing stones before taking them. It could be an unrefined Aethyrite, but there's always
the possibility of something far worse.