Nyxborn Kitty

Bestow {3}{b} (If you cast this card for its bestow cost,
it's an Aura spell with enchant creature. It becomes a
creature again if it's not attached to a creature.)
When Nyxborn Kitty leaves play, target opponent
loses one life.
Enchanted creature gets +1/+1 and "When this
creature leaves play, target opponent loses one
life."
"Amazing a nightmare of a cat attack so fierce that
it leaves cuts on the dreamer!"