Cryptolith Fragment

This artifact enters tapped.
{T}: Add one mana of any color. Each player loses 1 life.
At the beginning of your upkeep, if each player has 10 or less life, transform this artifact.

"I felt compelled to take the twisted stone, and I abandoned my horse's burden to accommodate its weight. Now, its continued glow illuminates my home and warms my mind."
—Garner Kroft, Moorland farmer

Aurora of Emrakul

Flying, deathtouch
Whenever this creature attacks, each opponent loses 3 life.

Cryptolith Fragment / Aurora of Emrakul