The Blackened Cycle

Equipped creature gains +0/+1. If the equipped creature is a Skeleton, Vampire, or Zombie, it
gains +0/+2 instead. If the equipped creature is
a Skeleton, Vampire, or Zombie, whenever it's
damage is removed at the cleanup step, gain life
equal to the damage removed.
Equip {3}
Equip Skeleton, Vampire, or Zombie {w/b}
"Well, the ring gives you a facsimile of life, allowing healing magic to flow properly through your body."
—Lance explaining how the ring works to Bones.