Pure Luck

Roll a 20-sided die. If you roll an 11 or higher,
you gain that much life. If you roll a 10 or lower,
you lose 10 life.
Signature: Ethana, Eternal Bargainer (A signature
spell can only be cast if you control the referred card.)
"I will give you great fortune, or great death..."
-Ethana, Eternal Bargainer to Matthew Lee