Dark Petition
Sorcery
Search your library for a card and put that card into your hand. Then shuffle your library.
Spell mastery — If there are two or more instant and/or sorcery cards in your graveyard, add .
Illustrated by
Magic Origins#90RareEnglishLegality
Rulings
Jun 22, 2015
Check to see if there are two or more instant and/or sorcery cards in your graveyard as the spell resolves to determine whether the spell mastery ability applies. The spell itself won’t count because it’s still on the stack as you make this check.