Soah, the Apprentice of Vera

Afterlife 1, Vigilance
When Soah, the Apprentice of Vera attacks or
blocks choose one- draw 3 cards or target instant
or sorcery in your graveyard returns to your hand.
{t}{w/b}{w/b} All damage dealt to your creatures and
you are added up and if the sum is less than 20,
roll a twenty-sided die. If you roll above the sum
all damage to your forces is canceled, however, if
you roll the sum or less than the sum the damage
to your forces are doubled