Crippling Sorrows

Enchant any creature in the battlefield.
Enchanted creature gets -1/-1, gains "At the
beginning of your upkeep, you lose 4 life. This loss of
life can't be prevented." and "{3}{b}: Sacrifice this
creature: You lose the game.", and loses all other abilities.
—
"Few things are more frightening than the constant reminder of what is, what was, and what could've
been. Take care of yourself kid, tend to your wounds. However deep they might be, they'll eventually heal."