Lucy, Unicorn Princess

Vigilance, shroud.
When Lucille, Princess of Unicorns enters the battlefield, you gain 20 life.
Whenever a creature you control takes combat damage, you gain 1 life.
All Unicorns you control get +2/+0.
{u}{u}{w}{w}{5} Whenever a creature that target player controls attacks, you gain 1 life.