Your search for "Pearl Medallion 300" revealed the following:
Pearl Medallion (TMP) from Tempest, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: Sue Ellen Brown Card Text:Your white spells cost 1 less to play.
Pearl Medallion - TMP Reprint (PLST) from The List, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: Sue Ellen Brown Card Text:Your white spells cost 1 less to play.