A diamond, white, this stone the eighthA precious jewel for those of faithA whispered prayer restores the lostBut none among them know the cost.

Lesser Diamond Spellstone is a 7 Mana Cost Rare Priest Spell card from the Kobolds and Catacombs set!

The Priest Diamond Spellstone was originally labeled as an Epic, but Mike Donais confirmed that all Spellstones are Rare: