Beseech the Queen is a mythic Sorcery card from From the Vault: Lore (V16), collector number 1. Current market price: — (foil $6.23), TCGplayer market prices via Scryfall.
({2/B} can be paid with any two mana or with {B}. This card's mana value is 6.) Search your library for a card with mana value less than or equal to the number of lands you control, reveal it, put it into your hand, then shuffle.