Whenever Pious Evangel or another creature enters the battlefield under your control, you gain 1 life.
{2}, {T}, Sacrifice another permanent: Transform Pious Evangel.
For more information on double-faced cards, see the Shadows over Innistrad mechanics article (http://magic.wizards.com/en/articles/archive/feature/shadows-over-innistrad-mechanics).
If Pious Evangel enters the battlefield at the same time as another creature you control, Pious Evangel’s ability triggers once for the other creature as well as once for itself.
If Wayward Disciple dies at the same time as another creature you control, Wayward Disciple’s ability triggers once for the other creature as well as once for itself.