Luna's Conscience

Whenever you cast a spell, you may instead
search your library for a card with the same
converted mana cost as that spell. If you do, you
may cast that spell without paying its mana cost,
then shuffle the original spell into your library.
You may cast spells as though they have flash.
"Despite searching the realities for a purpose greater
than myself, I have learned that these Athertons need
me."