You may use the Treasure token created by the first part of Widespread Thieving's last ability to pay part of the {W}{U}{B}{R}{G} cost in the second part of that ability.
Widespread Thieving
Any player who has controlled a permanent with a hideaway ability since a card was exiled with it may look at that card.
Previously, permanents with hideaway entered the battlefield tapped. This ability has been removed from the definition of hideaway. Older cards have received errata to have an additional paragraph that reads “[This permanent] enters the battlefield tapped,” and they now have hideaway 4.
Magic: The Gathering · ™ & © Wizards of the Coast · Illus. Andrew Mar
Card data via Scryfall. Rarix is fan-made; not endorsed by the rights holders.
