Angelic Chorus

Whenever a creature enters the battlefield under your control, you gain life equal to its toughness.
"In my infiltration of the deepest sanctums of the Imperial Palace, I beheld an angel so deep within prayer that it did not notice me. But that merely begs the question: what does an angel, the manifestation of all that is pious, devote hymns of reverence towards?"
-Ceros, Wandering Scholar.