Miriel, Studious Mage

Awakening {3}{u}: (Paying for this once keeps it active until the awakened card leaves the battlefield) When you cast or copy an instant, sorcery, or creature add a scholar counter to Miriel, Studious Mage.

You may sacrifice Miriel, Studious mage, if you do search your library for a card with converted mana cost equal to or lesser than the number of scholar counters on Miriel.