Priestess of the Fount, Fretia

Flash
When Priestess of the Fount, Fretia, enters the
battlefield, your Corrupted creatures gains +1/+1
and indestructible while this card is on the battlefield.
{w}{w}{w}, {t}: Untap all creatures you control.
If Lily, the Priestess of the End is destroyed, you
can search your library for two lands, put one on
the battlefield, and add the other to your hand.

"What was it all for...?