Sans The Skeleton

This card's mana cost cannot be reduced.
This card gains +2/+0 for every creature in your graveyard.
If this card were to gain toughness,
It gains half of that toughness instead.
Karmatic Retribution:
If your opponent would gain life,
they gain an equal amount of KR Tokens with
"{1}{t} Sacrifice this artifact; Gain 1 life" instead.
This card cannot be cast or summoned from the graveyard or exile.