Herald of Dragonspine

Circle of Death - {5}{b}: Roll a d20.
1-9 | Each opponent loses 2 life.
10-19 | Each opponent loses 2 life and you
gain 2 life.
20 | Each opponent loses 2 life and you
gain 2 life. Create two Treasure tokens.
(They're artifacts with "Tap, Sacrifice this
artifact: Add one mana of any color.")