Threat Of The Tattooed Man!
After having his portrait painted by artist Lee Kerr for an art exhibition (which leaves Carol madly jealous when she sees that Lee is an attractive woman) The gallery is robbed by the Tattooed Man, a sailor who's tattoos become reality once he touches them. Using them to best Green Lantern in combat, the Tattooed Man manages to escape with the loot he had come to steal. As he gets away he recounts how he got his powers one day while breaking into a science lab and finding a special ink that turns whatever is drawn with it into reality.
Freeing himself from the tattoo eagle that was created to carry him away, Green Lantern suspects that Tattooed Man's next theft will be of two priceless crowns and so he uses his power ring to coat them with a radiation that will set off his power ring if they are taken from their display cases.