Julia Wicker, Spurned Prodigy

Instants and Sorceries you cast from your hand have, "When this spell resolves, put it into exile
with a Spellbook Counter on it."
You may cast Instants and Sorceries from among those in exile with Spellbook Counters on them.
If you do, put that spell into its owner's graveyard.

Divine Conduit: For as long as there are at least 4 Instants and/or Sorceries among those in exile with Spellbook Counters, spells you cast from exile gain Flash, and cost {2} less to cast.