Clarion Ultimatum is a rare Sorcery card from Shards of Alara (ALA), collector number 163. Current market price: $0.29 (foil $2.23), TCGplayer market prices via Scryfall.
Choose five permanents you control. For each of those permanents, you may search your library for a card with the same name as that permanent. Put those cards onto the battlefield tapped, then shuffle.